I have Asthma and Want to be in a sport.?

Hello, im 13. I have Asthma, and its not very serious, but it gets the worst of me when im running,biking, ect. ect. I really want to be in a Sport, but im not Athletic AT ALL. I really wan't to change that. What sport would suit me, my favorite things to do is Snowboard, and go bike riding on a little BMX bike. Im not quite talented, so is there a "easy" sport?