My first glow plane was a 4*60. I started out with electrics (100% self taught) then moved onto to faster electrics. I instructed a buddy on his glow trainer liked the power and speed so I jumped right into a 4*60 powered by a TT.91RFS swinging an APC 14x6 prop without an instructor. Even flew its maiden flight.

I'd say go for it. You'll be fine. Take is easy the first few flights until you get your feet wet. Good luck.