1. You mean pause, as in you stop doing stuff, or you pause the actual game? If it's pausing the actual game, you won't be able to do that online, so you'll just screw yourself over with a menu popping up while the game continues. And in a tournament it's an automatic loss.
2. These took me a while to get the hang of too. It just comes with playing more.
3. Same with this. If stuff isn't coming out then you should go into training mode and work on getting the moves down. You want to be able to do your moves consistently, or at least work on it as time goes on.
Yomi -- a japanese term for "reading," in other words, reading the mind of your opponent, seeing ahead to what they're going to do, and countering it.
Okizeme -- "oki" for short, means the options you have when you knock someone down and want to go for mixup.