I'm a professional in my 30s and carry a backpack with me. I work out of bars and coffee shops all over New Haven and near Yale.

You are bettering yourself and your life. Always wear that proudly.

And if it helps, I went back to college at 26 and was in classes with ACTUAL children lol Not just young, like 17, not yet an adult haha. You're not encroaching. That spaces is just as much yours as anyone else's. Own it. And good on you for the growth.