As you have one opinion of corne too small I'll join in to the opposite!
First off, yes, layers are something to get used to. As I came from the neo2 layout that was easier but I still recall the utter pain in the beginning.
But once the layers click ... So does the board.
I think I spent more one than I'd like to admit building my zmk config but now I'm .... Way slower than with a full board but it's more fun and I feel getting better :D