There was a bit of a learning curve, but I was used to split ortholinear keyboards already, so for me it wasn't all that steep. YMMV though, if you don't already have experience with a similar style of keyboard it might take longer.

I think for me it helped that none of the keys are odd shapes and sizes too. The arrow keys for example are the same size as all the others, unlike some (even larger!) laptops.

I bought a ZSA Moonlander and have a poor on-and-off-again relationship with it. However, the smaller ortho on the MNT Pocket was easier for me to use and I am not a great typist. Unfortunately the small screen of the Pocket at this stage in life is a bit of a strain to use for long periods so I wind up using my surface or X1 carbon when not at my PC.

For me it was a blast. You just gotta embrace it. I can go back to a staggered board, no problem, but I prefer to use a Planck-like 47-key layout. If nothing else it's just more fun. Put a lot of thought into your layout and don't be afraid to scrap it all and start over.