I've been trying to work on this project too. Are you planning on joining the Rebel Legion? If so you should check out their standards and stuff. Also there are some very nice tutorials on the fabric parts I could link if you want.

As for the helmet, a guy in my RL base has a real flight helmet that he made into a Wedge helmet, and it looks amazing! But if you don't want to spend all that money on the real deal, Richie's kit is good also.