this tree has quite a few problems but its a try which is a good start
some notes on how to improve it...
-less trunk more tree, thin down the trunk and give it longer and skinnier branches not just stumps
-waaay more foliage Mush's example is a perfect trunk to foliage ratio
-figure out where your light is coming from cause the bottom left is alittle impossible
-get the tree shape down before you try to mess with the shading and texture
i hope this helps at all and you can improve your tree that looks like it should go outside a doll house
Good Luck
