Congrats!
First, take of those mudflaps! Save you the effort of having to take them off moments after breaking them. Mine broke the first time I took mine off-road in sand.
It's a good vehicle right out of the box. There are things you could do to it, but nothing that needs to be done.
I know whatcha mean about white paint. I think I would probably put some accent paint stripes on it. It's a quick an easy way to jazz up a basic paint job. Then again, I have my own spray equipment...
Enjoy your ride!