So I've been an inactive couch potato most of my life, atleast before I started my self-improvement journey. These days I eat a super strict diet and I'm really into exercising. I don't really go to gyms because I have some weights and stuff I use at home, and I do lots of stretching/body weight type exercises. I've been putting on lean muscle and I feel more confident about my body and people are noticing. However, I have no idea what kind of clothes fit guys wear. I mostly wear the same clothes I've always worn, what do you guys recommend?

Also, I really don't care about brand names because I'm not trying to be a walking symbol of consumerism. Pretty much all I wear is T shirts and cargo shorts. I don't even own "exercise clothes." So what kind of clothes are practical and stylish for lean/fit guys? I'm 27.