You should learn to skateboard. It is cheap and fun. It is something you can do when you are alone or with friends. Once you learn, you can hang out late at night in parking lots for hours and hours (and you don’t even have to be high). Also you can talk to others about skateboarding and it will make them think you are cool and they will give you things like free stickers, or invitations to parties with lots of guys at them. If you get good you can jump over all sorts of things like cars, and European streets, and statues, and off small buildings. and people will take pictures of you which is nice (for later, to show your kids). If you get really good, maybe someone will pay you to take pictures, and make videos of you jumping off all sorts of crap and they will put you on billboards and benches where homeless people sleep and your name will be on thousands of pairs of shoes. Maybe you will have a video game with you in it or a TV show where you shoot your friends with weapons. Or maybe not. Maybe you will just keep doing it and no one will really care how good you are and you will just use your skateboard to ride down the street to buy some beer when your “old lady” takes off with the car.
It’s up to you I guess. Like anything else.
But you should definitely learn. It will be worth it in the long run.