Everyone has different levels of susceptibility to hypnosis. Some are easily hypnotized. Others are more difficult to hypnotize. But if the person truly wants it, they will eventually by hypnotized. It may take different inductions or techniques, but it will happen.

Remember that it starts with commitment by you. You have to want it to happen. Hypnosis can’t make you do something you don’t want to do. That said, since you’re asking, you must want it at some level.
I suggest several things to help you. First work on breathing exercises. Separate from hypnosis, find time to lay down and just breathe. Nice and slowly, in through your nose and out through your mouth. While this is happening, focus only on your breathing. Feel every muscle move. Then force yourself to slow down your breathing, nice steady, longer breaths. Don’t hold your breath, just stretch it out, comfortably.
Now, when you do hypnosis, focus on this breathing exercise. It will give your conscious mind something else to do. Also, switch to a different induction. In particular, try Mommy Emma’s Confusion Induction. It is specifically designed for over-analyzing minds.
I hope these suggestions help you! Good luck on your journey to being a better baby!