what i love about improvisation in general is that to improve at it you don't need to avoid mistakes, you just need to keep doing it again and again until it feels comfortable, like your fingers aren't inhibiting what you really want to do. i think that's the best way to find your own voice. it can be kind of crushing realizing what you naturally do isn't just like your favorite players but i think that's something that should be overcome.
but yeah, to answer the question i'd practice by listening to a song i like but don't entirely understand rhythmically, harmonically etc. then sitting down (unplugged) and try to recreate it but embrace that fact that you obviously have no idea what you're doing and see where it takes you.





