Practise your remount. Work on getting your remount position as close to the cockpit as possible, to speed up the process.
Practise your scramble, and expect to get bruised inner thighs!
To improve your balance, practise this in shallow water: sit behind your cockpit with your legs astride and try paddling. Progress to paddling while sitting in the same position with your legs inside the cockpit.
For additional support try sculling strokes while you get your legs and backside into your kayak.