Tree Sketches

I am really not sure what to do with this project. I don't know how to draw environments or trees. I would like to be taught, but because I know I wont do a good job with it, it's hard to think of anything good
The general idea with these sketches though is that the person is all alone and the only thing there is a tree to look after them.

I like this end sketch because it seems like the end. I like the idea of the tree taking center stage of the piece.