There are two answers to that:
Non-commercially: Nothing beyond the usual. Go make some free UDK games.
Commercially: You’re probably out of luck now. Epic has ceased selling licenses to customers for commercial use.
Just asking out of curiosity, I’m never gonna finish a game let alone publish it.
You will never know until you try and just soldier through it. No excuses. Focus on the game and you will eventually complete it before you realize it. However do start small when in doubt. No heroics. No “Great Journey” projects. Start with small, short-length, games or tech demos.