I wouldn’t say you’re wasting your time but you do have many things to consider.
Kros’ advice is pretty spot on. Also, keep in mind that hours of training while owning the game does not equal better player. If you can only play SSF4 for say… an hour a day but if it’s productive training and you learn from it that’s what matter.
When I used to be big into the SF3 scene, I remember I woud play a few top players here and there. One of them told me he never own a console in his life. He just bought an arcade stick and would play at tournaments. No practice mode all day, no watching YouTube videos, no nothing. Just strait tournaments. He was a damn force to be reckoned with. Always got top 3. I can’t say who, cause I think he likes that being his secret.
Anyway, do what you gotta do to stay competitive is what I say.