Playing 2NL can be a real pain in the ass. Sure as hell you are going to win even if you just play mediocre poker at best. But short term, the variance can be devastating. With a 100$-roll I would actually suggest you go try out 10NL. The players sucks here to, but you will at least experience something that feels a little bit like real poker. Actually I would consider 100$ to small to start out online poker, I think its better to save 500 bucks and get started right away. However, 500$ can mean different things for different people. I sure as hell thought 500$ was a lot of money when I started out with my 20$ LOL. But if you could, in some way, manage to spare 500$ that would give your poker "career" the starting boost it needs.