If you are at a 0% tax bracket, I would advise investing this in a taxable account. You are likely to retire early, and the Roth has restrictions until age 59.5. As long as you stay in the 15% tax bracket, your dividends and capital gains will be taxed at 0%, without the draconian restrictions of a Roth IRA.
When you start making income, only contribute to the tIRA AFTER you have maxed out your 401k (by max, I don't mean the match, I mean the IRS maximum of 18k per year).
Hope this helps, I opened up my first tIRA at age 18, before I even started college, for the same reason you did. I only had $100, but wanted to get the ball rolling somehow.