Dale,,
Good on you!
My son used Bass for dummies and found it very helpful.
He started from scratch though.
At least you have all your theory from keys behind you.
Unlike many adept muso's I have played with over the years, my son(s) never did understand the importance of being able to change key on the fly. Both preferred to "learn" by downloading tabs.
What would their old man know huh lol.
Anyway, enjoy your next musical journey

Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...