First focus on the majors about which you are thinking. Once you have that list of colleges, see which of them have your sport at the level you wish to play.
Intramural sports programs provide students an opportunity to participate in a variety of competitive and recreational sport activities. You may encounter leagues for men's, women's, or mixed (co-recreational, or CoRec) teams.
Around puberty, or 13-14 years of age, is a typical mark for youngsters to start lifting weights. I have trained kids from ages 9-12 in simple strength training like resistance bands, light free weights, and body weight exercises.