So I recently was inspired by some youtube videos and I think i'm gonna finally dive into a build! I picked up an old epiphone s310 and plan on franken-izing (?) It! I chose it simply because of the maple neck and banana headstock

Plan is to weather and stripe (my own colors though) and add a humbucker with a kill switch. I found thus diagram but I am no wiring wizard. Any suggestions on A) a good cheap metal pickup and B) how the hell to wire this thing? Thanks in advance and will keep the build updated!

Wiring g diagram: