I've wanted to be able to play boogie-woogie piano for a long time, and as a pianist who took a decade of lessons and has played for another 30 years after that, I feel like I should know how to play just about anything, right?

Of course that's ridiculous. Boogie-woogie piano has very strong rhythm in the left hand which needs to be drilled until you can play it without any thought - and then for the right hand, you need to learn how to play all the little bluesy riffs, runs, etc. None of this is especially difficult in isolation (one hand at a time), but doing two complicated new things at once is just too much.

So I've just been practicing the pieces individually until I can do them automatically - my brain becomes more like a conductor telling my hands to play specific macros.