I think people forget sometimes that fun isn’t the only point, but it’s mostly the point. Rip around on a bike sometimes, dye your hair blue, eat food that is so spicy it’s meant to cause you pain, and enjoy this whole thing.
This definitely isn’t a mid-life crisis. Don’t worry. I don’t feel like I’m getting too old. (Not quite yet.) What I do feel is a desire to do the things that I still can do, because at some point I won’t be able to physically.
Have fun. Go to the bike park. Ride like you still got it.