Since you know your goal is to get your body out of the water. Work on projecting your body to the surface…
Starts when you are sitting there in the water before you say go.
The tight ball is good but you have to balance that with needing to use your strong legs to protect your weak back otherwise you get crumpled into the ski and you have to be superman to stand up out of that.
So this is my tip for you. Knees are bent but more specifically you want your back heel to be in the crack of your butt - that way the ski is not going to go straight up and down in the water and turn into a plow. Arms fully straight - your two knees should be by your elbows at this point. When you say hit it and as the boat starts to pull you want to think about this - Eyes up at the boat not down at your ski shoulders back arms straight, and engage your butt to start to extend your hips.
Here is a beautifully rendered drawing of the difference - top what I suggest as the boat pulls you want to project your butt upwards which will prevent the bottom shoulders being pulled forwards butt sinking down and back which forces the ski upright in the water and pulls your handle to the top deck of the ski.
The “deep Vee” handles have a cross bar that as your shoulders get pulled forwards pulls the top deck of the ski down into the water flatter which then makes the space for you. Notice the vector of your motion drawn as an arrow - UP vs. Forwards.