Welcome to the FISD! For info on the Rogue One Tk, check out this area of posts:
https://www.whitearmor.net/forum/forum/162-rogue-one/
For general tips go through the Getting Started section. There are vendor lists and supply lists, etc.
Also, for general tips and info check out this:
https://www.whitearmor.net/forum/forum/79-tutorials-tips-and-howtos/
I'm a OT TK and can't help too much with the Rogue One version, but there are some troopers here that can certainly help. Good luck with the build!