This keyboard is so dependent on layers that the Fn key is more important that the spacebar, apparently.
Honestly, training your muscle-memory for fast touch-typing on this thing must be a chore, and it's only good for this one specific layout, too. It's not like you can transfer that learned skill to other 40% keyboards, even if you're a 40% fan (and I'm most definitely not).
I do get that there's not really a 'standard' 40% layout but this one looks weirder than most, and therefore is going to require more adjustment than most. I might be an outlier perhaps, but the #1 decision I make when choosing a keyboard is the layout. If it's not standard or close to standard then it's immediately disqualified for being an abomination against my existing touch-typing skill set.