This one was fine at one point and then I thought I needed more darks but you have to be very careful and us the right brush. I used a brush which was too large and covered too much area with darks.
Here is the view I sketched. After finishing, I thought the trees were too dark and drew too much attention to the shadowed areas.
This is the sketch having lightened up the shadowed area. I think it is better. But still need to simplify!