I'm 23 and recently started a full-time graduate program that includes full scholarship plus a modest living stipend (27k). Apparently I live more modestly than they expected, because I have been enjoying a significant surplus at the end of each pay period. Having extra money for the first time in my life, and realizing that I won't always be 23, I decided to enter the world of investing, and I was very fortunate in that the first financial professional I met with is a big proponent of the Boglehead style of investing (although I'm not sure he knows it

The problem is, I'm having trouble finding any sort of tax shelter for my investments. I don't receive a W2 from my program, which I believe means that my income doesn't qualify for IRA contributions. Unfortunately, it doesn't mean that the income is exempt from income taxes (I have to pay estimated quarterly taxes). There is no 401(k) program available to graduate students here either. So my question is, is there any sort of tax shelter available for a graduate student who doesn't get a W2? I am a legal resident of Michigan and living/going to school in Illinois. Thanks in advance for the help!
[edited to remove personal portfolio information]