To lead a mod is a really difficult and time-consuming task. So to lead 3 mods...
Just look at the forums. How many big projects are out so far? Very few seeing the whole list. Lot of new projects recently started by enthousiastic people are dieing very quickly... the lack of modders, especially modelers and mappers is a pity.
Just look around, there are already some projects you can help: Hegemonia for classical greece, Troy TW for mycanean era, Antiquity TW for 'ancient' mediterannean, etc... it would be the best for you to do so.
For your Hellinistic era there have been a mod called The Sucessors TW but as far I know it's dead. If you really want to do it, ask RTR or EB to create a submod, you would have the main part of your models already done - BTW the period you like is featured in RTW vanilla, just with a bigger map.
But for the rest, I hope you have time to spare... as a mod leader I learned codding, skinning, mapping basics and I eventually plan to learn modeling... all things you can't find people to do it need to be done by your way, and Arthurian TW got a quite big team...
Sorry for being so pessimistic, but all recent projects have died few weeks, or one or two months after their start. And I rather like to see 10 complete mods than 50 dead mods
