Were I in your shoes, I would continue to work on your balance and getting the balance/movement under control. From what I understand, these single leg movements really work on the musculature of the hips and the fact that you've been through a whole segment of Alwyn's workouts and still can't do them without holding on tells me that you are not ready to move on to the harder compound movement.
In conclusion, take your hand a-way from the wall!

Stand close to the wall so that you can fall into it without hurting yourself, but remove your crutch before you move on.