Personally I thing 1/4 grain is a good starting point, For one You need to see how your body reacts to the meds, and secondly Your being treated now. This is a good thing. You will be retested in 7 weeks so more than likely you will be increased if needed at that time. I started out on a very low dose as well and I did feel a bit better on it. I had to be upped after my first labs but As sick as I was when I was finally DX'd I was glad they took the time to adjust my doses slowly I don't think my body could have handled a large starting dose.
Thyroid treatment is allot like stepping stones. One step at a timeGlad your being treated finally. Just my two cents.