It's a good "first drawing"...
maybe some doubts about underwater panels ...
As you pointed out, it's first drawing. So, I'll take what I can get.
And while "doubts" are expected, they're hardly helpful in terms of improving the drawing.
Mind serving a side of commentary/input along with that entre of doubts?
He might want to say that he's sure about the panals in term in ''correct'' not in term of drawing.