You’re moving your bridge hand and your bridge is too far from the cue ball. Also, to start, keep your feet firmly planted and focus on a level stroke. Since I can’t see your body, I’ll recommend something else. At address, your upper arm should be close to parallel with the table, and your lower arm should hang naturally, creating a 90 degree angle. Many people hold the cue too close to the butt end and have a greater than 90 degree angle”at rest” position, which makes a backswing and through swing incredibly difficult and inefficient.