What programming languages are best to learn for on-chain?

What programming languages are best to learn for on-chain?

I’m looking to find a career in some type of field working in crypto and it seems the best way to get involved is by gaining programming experience.

My questions are what would be a good course path to follow if I want this to be my end goal? And what programming languages are best to learn for this goal?

I read that python, rust, or c++ would be beneficial. What other skills should I focus on learning?