Self ⁄ Tips

My fast metabolism has sort of helped me to keep a somewhat healthy body shape.
I'm still small tho, so I thought I'd look good in girl clothes, Imo i sort of did.
however I'd like to look better and I thought of practicing some sports (plus my psychotherapist wants me to go outside more often since I wasn't admitted in college)
I'd like to do some box or combat based sports, but they seem to be expensive and it probably will give me a more masculine look.
so I thought of tennis or maybe soccer.
what should I do? Any sports you recommend?