I'd stick with alumunums for a while (Easton), especially while new to everything. They are a bit easier to tune, and are a bit more forgiving IMO.
I would add that aluminums are straighter and far more consistent than any carbon arrow in the same price range. When you're starting out, you need to know whether your shot was good or bad. With carbon, I've found myself missing the dot by several inches and wondering whether it was the shot or the arrow that wasn't right. With aluminums, you know it was you that messed up.
XX75 Gamegetter II's are great arrows for a very good price. Since you're likely to flub a few shots and miss a bit at this stage of your learning curve, I'd suggest sticking with the heavier weight arrows in your spine range. They won't shoot as fast as carbons but they'll be plenty durable.