This is close, but not quite. Once you've unracked the bar, take your valsalva and flex your quads and trunk as hard as you can.
This will create a "band" from your knees to your sternum, then push your hips into that band to build tension.
Right now you're "winding up" with your hips. When you move your hips backward right before the press, you've lost that tight band.
We are making tension, pushing into it, then translating that force into upward movement.
Unrack, valsalva+get tight, shove your hips into that tightness, press.
Good luck and godspeed!