Alright! Another convert!
You might want to try searching online for some of the Chess Records compilations done some years ago. They had a whole series of 2-album sets done by Muddy Waters, Howlin' Wolf, and others, which are all excellent. I have no idea if these have been re-released on CD, as I have the vinyls.
More modern artists like Stevie Ray Vaughan are readily available. There's one CD by Albert King and Stevie Ray which was released on CD by Stax which is outstanding!
I was lucky enough to get introduced to the blues when I was 16 (I'm now 55!), and I've never looked back!
