Lol it's really not that good sorry. Sure it may be simple, but not in a good way because essentially you don't even need to use a render if you just paste it on top and do nothing with it. Look where the darken areas of the render are (shadow) and incorporate that into your background and brushes. There's also no sense of focal point so it just makes the overall look a mess.
Also, maybe it's just me, but I don't like using custom brushes and then just erasing parts of it to make it look different.
