I hear ya. I'm a Network Engineer and had no clue what I was doing, but I got with my local Garrison members and they helped me figure it out. It was a lot of fun learning how to build the kit myself, and it also gave me the skills to repair it if something breaks. I don't think the Black Series helmets are approvalable with out some work, but I'll leave that to some of the crew with more experience with FO TKs, I highly suggest meeting with some local folks and seeing if they can help you build. There are sever great vendors for armor list her on the forums. I'd check out these to links for help.
1. I want to be a Stormtrooper. Where do I begin? https://www.whitearmor.net/forum/forum/38-getting-started-read-this-first/
2. Where do I buy armor? https://www.whitearmor.net/forum/topic/11538-the-various-types-of-armor-and-where-to-find-them/