15 year old seeking advice on sports

Hey, I'm 15 years old and I want to get into a sport or activity that does not involve going to a gym (I find gyms kinda boring). I'm tall and skinny and not fit at all and I want to actually look good so I'm going to sign myself up for a sport or activity but I don't know what to join. I'm looking for something to help me develop some decent muscle mass and loose just a little bit of body fat. What would you guys recommend. Ive been considering cross fit or hockey but I would like to hear some good suggestions.