I was a board artist.
I'm now a director.
I've been given drawings that were just a circle with two eyes and a mouth but I got it.
I've GIVEN drawings that didn't even have two eyes a mouth! Literally a rectangle with a letter on it on one side of the frame and it came back perfect!
It's fine!
If you're a director and you "can't draw", I can guarantee that if you just try anyway you will give PLENTY of information for a storyboard artist to be able to run with it.
There is no need to use AI.
Hand it to a storyboard artist and they might even have better ideas than what you thought of!