Tdogg, the 12 bar blues isn't tough, don't get stressed about it. It took me a bit to get it down too. But here it is. 12 bar blues is simply a chord progression that goes
I I I I IV IV I I V V I. err... something like that. Come to think of it I'm not sure I wrote that write. But you probably know the sound already, just having trouble recognizing the chords used. It's the I (root) IV (fourth) and V (fifth) of a scale. So in E it would be E, A, and B. E for four beats, A for two, E for two, then B for four (although there are many many variations of what you can do in the last four beats). I think I explained that right. For me, I can just hear the progression, and if I knwo the chords then the rest comes easily. You'll get that way too after hearing lots of blues.