That's all great but sorta drinking from the fire hose.
A very good first step would be getting an on-camera flash that you can bounce off a wall or ceiling and experimenting with that. It'll cost you a few hundred dollars (you can get one for less, just be sure it works with your camera as a bad pairing can fry your SLR), but it'll go a LONG way towards much better images when flash is necessary.
Beautiful baby, btw... and I don't say that to everyone.