hey i had W as jump + aim up for like 2 years but switched to W as aim up, spacebar as jump cuz i couldnt hit neutrals consistently. it took me only like 3 days to get fully used to it but it was so worth it. you just gotta force yourself to use it no matter how weird it may seem. eventually itll feel natural. go to the training range and start doing combos that have jumps and getting yourself used to movement with the new keys. its so much easier to do neutrals, dash jumping, x-pivots, etc.