And tools! Need lots of tools. Judging from my collection, about a quarter of a million dollars worth (don't tell the wife). But a cheap starter rc tool set will work for most kits you build.
Honestly bud, just do it. Every kit will come with instructions, almost all kits have video assembly demonstrations by various youtubers. There's no better way to learn than just do it. You'll make mistakes and have to take stuff back apart and back together, oh well. You'll learn that way...