Tips for salhcow in figure skating?

I'm starting my double now but Im still having troubles with the single. My only issue is getting the stop of rotation before the jump. When Im in the air my free leg is all wonky because I dont get the stop of rotation before I go up. My coach is trying to help me but I was wondering if you have any tips yourself. I really want to get the double by christmas but of course it would be stupid to try the double when my single is still a little bit shaky. Any tips?