Once you've practised these chords and you think they sound ok you're probably ready to start learning a few songs. A good place to look is tabrobot. It's a search engine that finds chords for songs you want to learn.
Pick a song you like, preferably one you listen to a lot, just type in the name of the song and click. If the song has chords you don't know, then go to nutchords (148k zip file). It's a freeware program that finds you any chord you need.
I can't vouch for everything on tabrobot but usually the chords are right or at least usable. If it's obviously wrong, try google, or try a few other songs, just don't give up.
Here's a couple to get you started ...
any problems? e-mail me