Notwithstanding that weird first rep, 3 things I would prioritize in your pull:
1. The bar is swinging back on you during the pull. Start with the bar over mid-foot, touching your shins. If you keep the bar in contact with your legs throughout the rep by dragging it up your legs, the bar will also stay right over mid-foot.
2. Pull the slack out of the bar by squeezing your chest up hard to set your back, with straight arms, before you pull the bar off the floor.
3. Make sure to come to full extension by locking your knees at the end of the pull, and keeping them locked. Don't unlock them at the top.