Curving into Mountains

Adjusting outlines of mountains by curving in. It's getting in shape in that part. Now I want to devine&adjust shapes inside of the mountains.The skirts of mountains are a little lower than they should be. At the same time I'll try adjusting values of those shapes.
At this moment I'm completely ignoring the trees in the foreground. Once I correctly defined those bigger mountain shapes, I'll put something(s) in foreground before getting into the details of the mountains and clouds.