Learning the chords you did was an excellent start. Find some songs with those chords and work on getting quick at the chord transitions. C-A-G-E-D is a good system to use to get quick at chord changes. Start playing around with fingerpicking, slides, hammer-ons, pull-offs -- there are tons of resources on this site & online with material for beginners. Try to add things that will keep you motivated in with your practicing -- so for instance take 20 minutes to learn some new theory, then for the other 20 minutes try to play part of a song you like or just noodle around with the guitar.