Hey guys! I need help to make a little mod to reorganise military management for Rome. When done it's supposed to look like this:

Tech tree changes:
Military --------------- Management I ------------------------------------------- Management II -------------------------------------------------------
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-------------------------- [Manipular Organisation] ----------------------------------------------------------------- [Remuneration Reforms] ---------------------
--------------------------- - Enables building of: ----------------------------------------------------------------------------------------------------------------------
----------------------------- Manipular Barracks (II) ------------------------------------------------------------------------------------------------------------------
----------------------------- Auxiliary Camp (II) ----------------------------------------------------------------------------------------------------------------------
[Supply Reforms] ----------------------------------------- [Training Reforms] ------ [Cohort Organisation] ------------------------------------------------------
-------------------------- [Naval Maneuvres] ----------------------------------------- - Enables building of: ------ [Double Plank Construction] ----------------
-------------------------- - Enables building of: ---------------------------------------- Cohort Barracks (III) ----- - Enables building of: -----------------------
---------------------------- Military Wharf (II) ------------------------------------------ Auxiliary Barracks (III) ---- Drydock (III) ------------------------------
---------------------------- Shipwright (II) ----------------------------------------------------------------------------- Docks (III) ---------------------------------

--- Management III ------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------------------------------------------------------------
---[Mercenary Auxiliaries] ----------------------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------ [Professional Soldiery] ------------------------------------------------------------------------------------------------------------
---[Fore & Aft Rigging] ---------- - Enables building of: --------------------------------------------------------------------------------------------------------------
-- - Enables building of: ---------- Legionary Barracks (IV) ----------------------------------------------------------------------------------------------------------
---- Portus Classis (IV) ----------- Auxiliary Garrison (IV) ------------------------------------------------------------------------------------------------------------
---- Coastal Patrol (IV) ----------- Basilica of Mars (IV) --------------------------------------------------------------------------------------------------------------
---- Basilica of Neptune (IV) -------------------------------------------------------------------------------------------------------------------------------------------

Recruitment availability changes:
-- Tier I ------------------------- Tier II ------------------------ Tier III -------------------------------------- Tier IV -------------------------------------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- [Field of Mars] ----------------- [Manipular Barracks] ----------- [Cohort Barracks] ---------------------------- [Legionary Barracks] -------------------------
-- - Unlocks recruitment of: ------ - Unlocks recruitment of: ------ - Unlocks recruitment of: --------------------- Unlocks recruitment of: --------------------
--- Hastati -------------------------- Equites -------------------------- Legatus (replace General & Bodyguard) ---- Praetorian Cavalry --------------------------
--- Velites -------------------------- Triarii ---------------------------- Legionary Cavalry (replace Equites) -------- Praetorian Guard (replace Praetorians) ----
-------------------------------------- Principes ------------------------- Praetorians ----------------------------------- Eagle Cohort (replace First Cohort) --------
-------------------------------------------------------------------------- First Cohort ----------------------------------- Evocati (replace Veteran Legionaries) -----
-------------------------------------------------------------------------- Veteran Legionaries (replace Triarii) -------- Legionary Cohort (replace Legionaries) ---
-------------------------------------------------------------------------- Legionaries (replace Principes) --------------------------------------------------------------
-------------------------------------------------------------------------- Legionaries (replace Hastati) ----------------------------------------------------------------
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
------------------------------------- [Auxiliary Camp] ---------------- [Auxiliary Barracks] --------------------------[Auxiliary Garrison] -------------------------
------------------------------------- - Unlocks recruitment of: ------- - Unlocks recruitment of: --------------------------------------------------------------------
--------------------------------------- Auxiliary infantry ---------------- Auxiliary Cavalry ---------------------------------------------------------------------------

I think that's about all I've planned for this mod. As soon as it would be finished, I'd upload it to Rome II Workshop on Steam for anyone to have easy access, as a part of a collection of other follow-up mods that would make up a nice mod pack. But I need your help guys, I've got a lot of ideas but no experience in using PFM or other modding essentials to start creating something. Any advice on the "hows" and "wheres" of things would be a huge help, and I'll really need it.

Thanks guys!