The signature as outcome seems nicely done.
Some points i don't like is the multiple lightning I mean his face lightning seems to be at the left so more lightning in right side doesn't stacks so good. Also to keep the things not messy try a flow here i see flow only on her left hand.....
My rating is 7,5/10 because is a good looking outcome
My advise is to work more on c4ds and stocks to understand the way we use them correctly..
KIU!