About the only useful thing I learnt in my class was how to recover from a feet first ascent. That being said the only times its ever happened is when I wanted to practice said skill.
I do suggest playing with the suit in your local dive shops pool so anything catastrophic is only at 10 feet or so. Will also help you learn to control your suit.
I did learn in a pool like you mention. I though did not use scuba to start.
I stayed in area of depth where I could stand and then progressively deeper with only lead weight belt.
With out using scuba, ascending to the surface holding breath is not like on scuba. A burst lung death at a college I found had stopped their scuba program there. It was in 3 feet depth. I heard of this just about 2 years after I was first cert ow in 80. Think it was 87 advance cert.
Only later did I start using scuba with a drysuit. Though prior as a skin diver I intentionally got air in my feet and practiced getting up right again while in pool practice.
It had both manual an power inflator on this close fitting regular neoprene suit.
I could have used neck seal to fill if no manual inflator, but the hood flap with a newer drysuit I have I use the warm neck collar.
Asking to do custom for that and they will not do it. Back when CA had ab free diving allowed (now all everywhere in CA stopped since last 5 years?), back in the 90's I used the drysuit to free dive and it was the greatest.
Courses I took I felt were useful, just never got drysuit course. Practice in a pool if not diving regularly is quite useful. I find a river that is blocked at the ocean is my current pool. Rainy season with low tide and it broken through it is got a swift current, not to be messed with. I stay out of it then.