Along with learning chords, get yourself a little metronome and learn to keep time. Without learning a sense of rhythm, all your stuff sounds weird. When I first started learning to play, people would ask "What's that?" I'd tell them and they'd say it really didn't sound like it. So I knew I was screwing up somewhere. I asked a friend about it, and he got me a metronome and taught me what it did and how to use it. I improved alot in a very short time.