The key is to practice running your bassline until you can do it w/out really thinking about it. Once you can play a bassline decent, then add in chords. I usually just concentrate on what chords I am playing and I can run the bassline no problem. I usually do it in Eb, but here it is in Ab:
Basic shout patterns for your left hand:
Ab, C, Db, D, Eb, F, Gb, G (repeat)
Ab, Bb, B, C, Db, F, Gb, G (repeat)
Basic chords for your right hand:
Gb-B-Eb , F-Bb-Db , Eb-Ab-Cb , Db-F-Bb , Cb-Eb-Ab , Bb-Db-F
(alternate A minor and B minor chords)
Both together:
Ab, C / Gb-B-Eb
Db, D / F-Bb-Db
Eb, F / Eb-Ab-Cb
Gb, G / F-Bb-Db
Ab, C / Eb-Ab-Cb
Db, D / Db-F-Bb
Eb, F / Cb-Eb-Ab
Gb, G / Bb-Db-F
(repeat)
Ab / Gb-B-Eb
Bb, B, C
Db / F-B-Eb
F, Gb, G /
(repeat)
Starting off:
Ab (2x)
C / C-Eb-Ab
Db / Db-F-Ab
Ab (2x)
D / B-D-F-Ab
Eb / C-Eb-Ab
(repeat)
Ab (2x)
C / Bb-E-Ab
Db / B-F-Ab
Ab (2x)
D / B-D-F-Ab
Eb / C-Eb-Ab
(repeat)
Ab (2x)
C / C-Eb-Ab
Db / Db-F-Ab
D / B-D-F-Ab
Eb / C-Eb-Ab
F / Eb-A-D
Gb / E-Bb-Eb
G / F-B-E
Shout:
Ab, C / Gb-B-Eb
Db, D / F-Bb-Db
Eb, F / Eb-Ab-Cb
Gb, G / F-Bb-Db
Ab, C / Eb-Ab-Cb
Db, D / Db-F-Bb
Eb, F / Cb-Eb-Ab
Gb, G / Bb-Db-F
(repeat)
Ab / Gb-B-Eb
Bb, B, C
Db / F-B-Eb
F, Gb, G /
(repeat)
I hope this can help you in some way.