While I sometimes think I'm missing out, I quickly settled for kick scooters when I was younger; I just wanted something simpler and smaller than a bike to ride around and a folding adult scooter is exactly that - apart from an occasional curb hop, no tricks or aggressive riding, but I can push hard and easily maintain a pace between a fast run and a sprint on flat ground. I actually took mine out again yesterday after a break of a few years. I get to carve a little bit, I have front and rear brakes, and I always get complements.
Tricks are another animal, but just cruising around can be learned in an afternoon in a parking lot. I picked it up as an adult. I mean there are bulldogs who can skate if you need motivation.
I gave up skating and eventually wake boarding (tore an ACL) for the same reasons. Surfing is something I feel like I can do forever. Snowboarding is also fine a few times/year. If I moved back to the mountains, I could see where doing it all season would end up also being pretty rough on the body though.
Something I've been doing a lot the past few years which is surprisingly not that rough on the body is jiu-jitsu. I did get dinged and bruised when starting out, but nothing like I used to get skating or wake boarding.
When I went to my surgeon he said I was the 4th wakeboarder he had done that summer and asked me why it was so rough on our knees lol...
[1] https://www.youtube.com/watch?v=dC3TEqcyT24
EDIT
It is amazingly fun though. If you can ride behind a nice boat with big wake and speakers so you can jam out while riding, it's a great experience. Plus, wakeboarding is social and always takes a minimum 2 people. Learn to drive the boat properly and always give some gas money, and you'll be invited over and over.
I wasn't even trying anything complicated yesterday; just a simple shuv-it on flat ground at a skatepark. Fell sideways onto my arm and felt a heart-sinking crack.