Watch the Fingerstyle Blues Essentials online guitar lesson by TrueFire from Play Blues Guitar 7: Fingerstyle Approaches
In this first section you'll learn some of the basic techniques of fingerstyle blues, and work on a variety of cool riffs and songs to build out your repertoire. There is no better way to learn a new style than just jumping into some things that are fun to play and sound great, while at the same time are helping you build new techniques.
TIP! Everything you work on should be started slowly, paying attention to the fine details of finger placement, minimum motion, efficient picking hand movement, and proper intonation. Then GRADUALLY increase your speed. Think baby steps. Don't try to jump from zero to 60 - take it slow. As you gradually speed up you will see other technique issues that need to be addressed. These are more easily discovered and dealt with at slow tempos. It is way harder to fix a problem that you have burned into your muscle memory than it is to just start slow and fix things along the way. So always start practicing a new thing slowly, and then build up your speed.