Great idea, I would start by speaking with a trained educator at a university or similar.

Maybe also get some other people on board to create a certified program so if your program doesn’t work out for the student, they can get some credit for spending/wasting time with your group.

Other thing is safety, if you’re dealing with young people and involve other adults, you want proper and lawful mechanisms to protect the kids and yourself.

Besides that, teaching is a skill by itself, and teaching poorly can have the opposite of the intended effect.

I would first acquire the necessary documents to prove I was eligible to work with kids