what's the best way to gain performance driving skill for a beginner?

RCZ

oh, you must always start with an instructor. Always, for learning and for safety. I don't know of any clubs around here that let you just "go at it" by yourself. I had to drive with instructors several times before getting signed off to drive solo class. Even now, I think I would benefit from different points of view about which lines are faster. I've had instructors show me different approaches to the same corner on the same day.

This is one of those things where you never stop learning.