Hello I'm a boy from iceland and I don't know what sport I should play I like baseball,football,badminton,tennis,taekwondo,socce r,or handball

Play them all? :)

Why do you have to choose?

I Agree, Play all those, plus you missed some. Racquet Ball, Ping pong for rainey days, others. Have 2 tennis racquets, balls, football, All equipment necessary, No reason someone can't play. You might get some friends healthy.
Play or practice against people better than yourself.

2 of my personal favorites... Hockey and Darts