1) 321 slide is cancer. Don't use that shit lol
2) Online is cancer. Just sayin'
3) I don't like using slide in my mixups, it makes it super unsafe and it can be punished with a huge combo.
4) 32b4 is kinda ass. b4 is fine because it gets through lows but in a string is kinda useless.
5) Xray wat.
6) I have no idea how to play against Sonya so I can't really give any advice. Just pick Kenshi lol
Otherwise yeah, pressure is great and stuff, now it's just matter of learning the MUs and getting used to hit confirming correctly.
Oh and prepare to drop everything offline. If you get too much used to online timing it'll take a bit to get used to offline. Not only combos, but even d4 to acid hand will be hard.
Also this: