Nice, I enjoyed that!
I’d say the bubbling bassline is going to come when you get confident playing at that speed. It’ll just be a case of building up fluency. I had the same with Sir Duke, just sounded like note soup until I’d become confident enough with the riff to then enjoy it.
To me it sounds like she’s using a pick, given the attack she’s getting on there too.
The fills are definitely hammer ons and pull offs. I guess it’s to get it to sound quite machine-like and automated.
The whole track is based around simple pentatonic, so practice those and enjoy! There’s definitely a Jaco vibe going on here too, with Teen Town being the closest I can think of. Some of the fills are certainly ‘inspired’ by that bassline.
I’d also say that most of this stuff beyond the riff (the fills particularly) is likely to be improvised so getting the groove and feel is more important than being able to nail every fill accurately. Perhaps that’s just me.