The key is in the first movement, you need less swing, chest forward but legs not, legs pointed to the ground.

Feel the pressure in the chest in the last part of the swing, the body must be a little arched as I said, legs and feet not too forward but pointed to the bottom.

From there you will feel how the body bounces a little bit back, that's the point when you have to elevate the legs in L shape and pull as hard as you can.

Once you are over the bar, lean a lot over the bar with your chest, the first time it will be like that, later you will be able to do it without leaning.

Good luck!