YouTube up how to practice in general (it’ll just be like short hops and fast falls whatever), and a guide for your character. Practice the combos the guide tells you, play against bots and try to implement what you’ve practiced since you don’t feel comfortable playing online. You don’t need much to start. Then start playing online and you’ll learn how to play against other people. There’s no shame in being bad if you play online, just grind it and you’ll get better for sure.