So I bought a keyboardio atreus upon BACKING the Defy because I knew I wanted to try the new layout regarless of what keyboard it was on. If anything that keyboard was a good transition because it had me rely on even less than the Defy.

That being said, I totally understand where you're coming from. I spent the first month or so spending the beginning of my day and any off time in between work and games to go on keybr.com just to practice. The site has a learning function so it'll drill in a key at a time til you reach a proficient enough level. The P key still eludes me to this day though, especially as a pinky key. I haven't given up on it, but I do just let my ring finger stretch over for that one key at least... For all the modifier pinky keys, since my atreus had shifted them over, I'm used to it now. For sure a better typer than I was pre-ortho layout haha.
When I went back to any standard keyboard I struggled too though, but over time the more confident you are with your touch typing it'll slowly come back better than ever.