Hello and welcome to the forums, the black series helmet is styled off Rogue One and not approvable without a lot of work, so for ANH version you won't be able to use it, note that the Hero version also is different to standard Stunt, Hero only have 6 teeth, 3 ear bumps, only 2 ear screws and bubble green lenses. You can find a few other differences list in this doc: https://drive.google.com/file/d/10tEVteIreh6AHMogW010cuH_Bf8TBfU6/view
Also check out the base requirements for ANH Hero here https://databank.501st.com/databank/Costuming:TK_anh_hero
Not many go with SDS these days but you can find a few threads in the builds area and also EIB and Centurion sections. Yu can find some great info following others builds so do the research and I'm sure you'll be fine.
The guys in Knightfall have a few armor workshops during the year so make sure you sign up on their forum: https://forum.501kfg.com/
Good luck and looking forward to the progress.