BG practice

So, I've been playing around in Krita for about a week now. This is my first "serious" attempt at a background. Just a field with a tree and a rock. I like how the grass turned out, and somewhat the rock, but the tree just didn't work out. Also the cloud. Some of the brushes in Krita do some wonky things, like while I'm "painting" the brush and lines look one way, but as soon as I lift up it changes. It makes it frustrating that it just doesn't look that way in the first place.