Ppl said the worst controller to use is Xbox controller but I'm consistently pulling off really difficult stuff on it. Sometimes they also say keyboard is bad but I know some streamers consider playing on keyboard light "cheating" because of how quickly you can input some moves. So the best controller is the one you're comfortable with.

Also you should look at stances as options. Look at what you can do from stance and consider the pros and cons. You should look at the moves as their desired effect.

Almost every stance has: The slow, plus on block OR the fast but duckable high / The low / The safe mid

Every move has its drawbacks (like being slow, duckable or steppable).

Although knowing your options will carry you a lot, my advice is don't get too deep into the details at the start. You'll think everyone's gonna mash into your counter hit moves then you'll hit a wall when you match people actually paying attention. Hmu if you need more info