1. To learn the position you need to hold while edging in and jumping through the air, try backward-facing side slides with two hands, in the middle of the wakes at slow speeds. If you can’t do the slide, then you will have problems holding the toeside twisted position and the rope will unwrap you in the air. This is why people slide on their heels when learning toeside jumps.
2. Toeside is more about position than pushing with your legs. Bending your legs and your body just causes too many problems. Take a tall edge in and remain tall through the wake, so the wake can pop you. Stay tall through the air until you have to land, then bend and absorb. Learn to pop this way, then start to add some legs and you will really fly.