Hi Keegan, welcome to FISD.
Glad to read you're on the way to become an Imperial Stormtrooper
All of us were in your feet once and know the feeling.
If you haven't done yet, take a look to others ESB builds HERE so you can see others work and decide the best way to build your armor , receive tips and advices.
We are here to help you.
Also this thread could be useful too.
About the helmet, it looks ok. Those "issues" are common in the OTTKs
Reference images