I also have forwards spine curvature in figure skates, which have relatively high heels, and a substantial upwards bend.
I tried rental figure skates (with much lower heels, less upwards bend), and hockey skates (no heels or bend) yesterday. They fit so badly (only a few points of contact on the sides, front and back), I couldn't really tell. My favored rink throws away skates that are at all broken down, so they were too stiff to conform to my feet. I could try other rinks...
I couldn't spin at all well, not that I'm very good at it anyway. And the toe picks were so dull, that both forward 3-turns and spins were awkward. But maybe with better toe picks and better fit??
At this point I can do very low bunny hops, waltz jumps and half rotation flip jumps, on both feet. I'm doing these very conservatively, with as little air and arm motion as possible, because I'm still weak. But even at my best, I never managed more than 1/2 rotation jumps on the ice, and my style is terrible.
In the rental skates I was literally afraid to jump. I managed a couple bunny hops off my stronger foot, but otherwise my body just said no. With such poor fit, I don't have enough control to be confident.
So that test was worthless.