The main chords you will be playing are A, C, D, E, and G. The F and B chords can be a bit daunting at first. If you are already working on A and E, I would suggest the next chord you could learn is D. This is because many songs that have A and E in them also have D.

The shape for D, when you think you are ready for the next step, is:

E||-----|--2--|-----|
B||-----|-----|--3--|
G||-----|--1--|-----|
D||-----|-----|-----|
A||--x--|-----|-----|
E||--x--|-----|-----|

The numbers are for where your fingers go. So your ring finger is number 3 for example. The x's are the strings that you don't play. So really you are only playing the top 4 strings for the D Major chord.