Hello [USER=40569]CADET115[/USER]! I see you have survived a derailment by FOTR.
You've made a great choice in a place to start with foam building. There are tons of super great tutorials here to fill your brain up with all kinds of information but you really just need to keep a couple of things in mind to get started. Sharp blades and clean cuts. My first foam build was a Sister of Battle from Warhammer. And then I decided I needed to dial things back and learn some better skills. I took a course during Costume College and learned how to make a foam cube. That taught me how to use the templates, make clean cuts, make angled cuts, proper gluing etc. Once you get those basics learned, there's not much limit to what you can make!