Stop after one.
Once you get to the edge, hands away. You can play with your tits and holes but your clit is left alone until the next morning, when you do exactly the same. Learn to soft edge, to take longer before getting there, when you have to stop.
Manage that for a week, and I might let you try for two. But go over, even a ruin, and you’re back to one edge only.
Good girl