And they will be able to prove liability because you don't know what you're doing as an instructor, they're on your horse, and you're claiming to teach. You're still at school so presumably a minor which means they'd go after your parents assets too. And since you clearly don't know how to teach beginner children there's a good chance that what you do teach them will have to be unlearned if they want to ride properly in the future.
For everyone's sake stop this. Once you have a riding instructor qualification and insurance then you can teach, until then tell the parents to send their kids to a proper school.
For everyone's sake stop this. Once you have a riding instructor qualification and insurance then you can teach, until then tell the parents to send their kids to a proper school.