To end this section, here is a slow Blues solo in the key of G minor. It is written in the style of Peter Green, one of the all time greats and a master of dynamics. You can find him on early Fleetwood Mac albums as well as "The biggest thing since Colossus" by Otis Spann.
You should play with other musicians as often as possible, listen to lots of Blues albums, transcribe licks, solos and rhythm parts, learn more about the history of the music and go to live shows of visiting Blues artists whenever you can. The more you immerse yourself in the music, the better your playing will get.