Capo 3 (or whatever works for your voice)
C C/B Am | G/B C
OR
C G/B Am | G/B C (basically you can use either C/B and G/B to get from C to Am and back to C)
The "chorus" is G D/F# Em | C /B Am D7/F# :|
I always add embellishments to the Em such as Em9 (add a D and an F# note).