lmao just follow the scales. for the chord Abmaj7 just kinda grove around A, maybe even just make it a one-note. for the Gmaj7 make it a G, and so on. everything after that just screw around with notes and just pick what feels good, dissonance isnt always bad if you use it right yk
yessirr just add like a grimy ass baseline during the verse and its perfect