Online engaging summer school suggestions for 16yo boy

Could some of you recommend a super engaging online course for my 16 yr old son to take this summer? He is an athlete & team sports may be hugely curtailed so I need a few ideas to occupy him. He’s really bright but NOT super academic & has ADHD. He loves controversy & argument so for example he’s been listening to Ben Shapiro podcasts to have something to argue with us liberal Jewish parents about (gay rights, feminism). He’s interested in economics, ethics, politics, black culture, business. I don’t care if he gets high school credit for the class but it might be incentive for him to compete for an A (he’s very competitive)! Thx