I have a similar setup with QMK. Where holding down the space bar with my thumb switches to the NAV layer and hjkl become arrow keys and other keys functions ch

I have a similar setup with QMK. Where holding down the space bar with my thumb switches to the NAV layer and hjkl become arrow keys and other keys functions change too, like m and n to PGDN and PGUP. Agree it is difficult at first switching back to a "normal" keyboard.