Well, you've been playing 3 weeks and you have most of the chords down, wow, can you play any songs with those chords yet? If you want to learn more chords, and you should because you have most assuredly only just barely scratched the surface of all the possibilities, check out the Hosts section of this site and the links also, you'll find alot of good info at both, Barre Chords are a chord form, you probaly know some of what we call Open chords, which is where we just about all start, well, chords keep on going all the way up the neck, so check out those sites and keep up the good work!