Welcome back Jerome. It’s great you are making your back to being a TK. I just assembled an ATA helmet which I bought years ago as a practice build. The ABS still looks fresh and new after sitting in a box for 5 years.
For boots, go with what Joseph and Glen recommend, Imperial Boots. I just bought a pair in December 2019 for my sandy and they are very comfortable. Still breaking them in while I work on the costume. Price is good too. Best of luck with your armor. Certainly visit the FISD builds when you can, it’s a great motivator. See you on the forum! Feel free to reach out to ask questions when you need help.