hey mav, glad to hear you giving the blues a try! R&B and Funk is where I want to ultimately head once I get better at the opens, timing, etc. LOL

good luck!

read up on the 12 bar blues. Alot of blues songs have only three chords, the I IV and V.

A7 A7 A7 A7
D7 D7 A7 A7
E7 D7 A7 E7

check this site for more information:
http://www.bluesforpeace.com/blueschords.htm