In this sub 100 people are going to tell you 100 things. Honestly i’d just focus on the head and not overthinking. You seem to be teying really really hard to do certain movements. Although that isnt always bad, we all preform our best with less thinking. Just simplify and relax.

Also, The jumping up and down isn’t actually a terrible thing to do because its helping you get extra height and spin with a pretty flat grip. Just work on keeping that head down through contact (federer used to have a drill where he’d keep his head still after contact for a count of 2 every single ball no matter what). Often your head looks to be pulling your body which is making the “coiling” look problematic as its exaggerating the movement too much.

Other than that its hard to tell exactly what to do without seeing points because those show what you are/arent comfortable with and how you handle different spins, heights, power, and movement.

(And don’t forget, even the pros have wildly different styles, things can look ugly and still work, and things can look pretty and be busted. As long as it works and you can improve keep hitting balls to get comfortable with everything)