Hi so i plan to get a ps3 next week but is it ok to practice movement on emulators or is it to inaccurate

Also i plan on using a ps5 controller for my ps3 is that a problem?

You can run on emu if you want to, as long as it's RPCS3 then they'll be pretty close anyway. There is a timegate for emu on this game, however, but you shouldn't really be worrying about it since you'll most likely already have a PS3 by the time you come close to the timegate.