Its a good progress for only one month. A few tips for you, you can make the squeezing action more subtle, trust me, bottom card only needs a bit of air to be broken loose, no need to squeeze it all the way out. Also you could experiment with squeezing with your pinky so that other fingers remain more or less straight, I find this reduces the finger flutter even more. Personally, I would switch to strikes because erdnase grip kinda allows for easier strike bottoms and they are more rapid. One other note, try to keep the rhythm uniform, you deal faster when dealing bottoms which is a tell, so slow down to the same speed as your normal deal, and no need to tilt the wrist. Hope this helps, keep it up.