man it doesn't look so good.
try to use a refference pic and start over again.

Its looking better. You've improved on the clouds but they still need improving.

Remember, when the panels of a car bends, so do the reflections. Also reflections are reflecting the background, so you have to get them to match near perfect or it wont look right. If there arent many clouds in the sky, there wont be many clouds on your paintowrk.

Keep going anyway