Watch the Barre Chords: 7ths online guitar lesson by Bruce Arnold from Jazz Guitar for Beginners
The jam tracks for the chord progressions get progress I'vely faster so skip ahead if you would like more of a challenge.
It is important to play the rhythm correctly with progression B. This rhythm is the core rhythm for playing the correct feel with jazz and blues so make sure you are copying my rhythm exactly.
In order to improve your understanding of jazz and blues rhythms and your basic feel try playing along with jazz and blues songs that you like.