Toby Walker, who is a member of this forum and posts here often, has a website specifically targeted at teaching people to play the blues. He has lesson sets targeted at beginners all the way up to advanced. You can purchase individual lesson sets or if you prefer he has added a membership platform which gives you access to all the available lessons. He's a great teacher, going beyond simply teaching you how to play a tune but how to embellish them to make them your own as you advance. I've learned a lot from his lessons.
www.tobywalkerslessons.com