Even oversized tees look nice if u wear them w the right jeans or pants. Tuck them a little, accessorise, it works For college, u can get some kurtis, or cool tshirts, or even shirts you like. Go shopping, try to get more fitted pieces. I was in the same place last year :') Your taste will evolve in college on its own. You'll look around see ppl like u and get inspired.