Well you have a good start. I would think that ten years of successful (i.e. making a living) sports betting would make for a unique anecdote and discussion during an interview.

A strong desire for maths with an ability to tolerate programming, maybe look for a path into data science or machine learning. I see on this site or reddit or lobste.rs for free online courses for both all the time.

Regardless, I wish you luck and hope things go well.