I'm not the best guitar player, and only have an acoustic available to me at the time... any ideas for some good Blues songs I could play?
The times they are a changin'.....
I'd start with some standard 1,4,5 type stuff and try and get the feeling down before jumping into hear my train a'comin. But that's just my advise.

Seriously though, look up some blues standards and just jam. Sloppy happens when playing sometimes, make em your own and try to play from the heart.
Breakfast; the most importent drink of the day.