How would you define your lease? Is it three lessons a week plus hacks? Because that is going to take up a LOT of your time.
You need to think about what is most important to you. Do you want to go to college for riding? Do you want to try to compete NCEA or NCAA or IHSA?
Will the colleges you are interested in take AP credits? If they don’t - take classes YOU are passionate about. Having a lot of APs on your transcript does not always mean something for colleges, especially if your grades aren’t stellar. If you aren’t confident you can ace an AP it might not be worth it.