Tony, I've been wondering how you were doing with your playing. I'm glad to hear you're still trucking along! Don't forget about justinguitar.com for lots of free lessons to get those other chord shapes down well. I would say look into A, E, Em, and Am as some good ones to work on. Here's a few in my book,
- If you put the Capo on the 4th fret, and learn the SUPER SIMPLE Em, you can do "I'm Yours" by Jason Mraz (G, D, Em, C).
- If you want to try "Wildflowers" by Tom Petty, it's just C, G, D ... but those are super fast changes (good practice!).
- "Blowing in the wind" adds a Dsus to your G, C, D ... just set your pinky down to make the sus chord and then lift it back up to go back to the D... it's really easy to do, try it, I think you'll like it!!
- Capo on 2nd fret and you can do "Bubbly" by Colbie Caillat (G, D, C, G pretty much the whole thing)
I know these are not country or church music, but they're fairly well known songs you might want to try Good luck! Oh, and here's a link to a "cheat sheet" for using that capo! http://www.chordie.com/forum/viewtopic.php?id=15164