Can you please show how you’d secure those grips when your opponent is hand fighting? I can do this during drilling no problem, but in sparring my opponent always knows what I’m going for as soon as I have the first grip.
As a lower belt I say from my experience, to get the first grip right it's tough but you can get it after trying and trying. And for the finish you can get your second grip you can get your own feet or opponent back and then readjust your posture or use your elbow while holding your opponent shoulder.
Put your elbows together as much as you can. I think where people mess up is winging open their elbows when they pull down which opens the scissor from the neck. If all else fails turn it to side control or use your feet off his hips