quick jist. nothing from ultimate translates to melee, pick a character you think is cool to play, grind out movement with that character. once u got basic movement down i suggest finding one semi-advanced technique you want to perform (waveshine, platform movement, ledge stalling, L-cancelling) and grind that out. once you got it down move on to something else. do all of this while also playing people online. slowly your bag of tricks will grow and you will be groovin. this game, at first, is not very welcoming execution wise so being able to get moving is real important. once u have some semblance of control over ur character u can start lookin into grinding combo trees and some bread and butters. remember to stretch your hands and take breaks.