You might want to look into hip mobility aswell, glutes, hip flexors, abductors etc.
do squats holding onto something and get into the position. Set a plate under your feet and keep going wider untill you cant get any wider then that, then do 20-30 squats, pause for alitle, get the paltes further out and keep progressing.
olympic shoes is good aswell as mentioned.
Oh squats, paused squats. be creative.
Ps: I went from hardly passing parallel to full snatches, and I have had some issues with hips, glutes and ankles