Online tutoring at 18 — is it realistic?

I’ve always needed some extra money, and I’m really good at high school math, so I’m thinking about trying online tutoring.

My main concern is that I have a lisp, and I’m not sure if that would be an issue for teaching online.

If it’s still doable, where and how should I start? Any platforms, tips, or personal experiences would really help.

Thanks a lot!