i've been working with the chromatic scale. my strategy is to let every note feel loved, and also to use the piano to lead the rhythm. it sounds very janky and awkward and dissonant, but there was a brief moment where i could hum each note before i played it at a not-very-fast place. i think i want to be able to do that faster: predict each note before i play it. but i wonder if my answer lies in intervals...
almost any exercise you can think of is probably good, but also be sure to balance that out with a lot of fun and good times