The reality is that you need to ask yourself wether you want a hobbyist' tool or a more common one for the same result.

Logitech's ergo k860 is affordable, has a palm rest (most mechanical keebs don't), and has an excellent ergonomical shape. And works right out of the box, with Bluetooth enabled.

The keys are membrane-based, which some may dislike because they are not mechanical - but it's actually more ergonomic, as they require much less pressure and travel length to achieve an input, meaning less wear on your fingers.

Membrane is not inherently more ergonomic, the "much less pressure" seems untrue since apparently it takes 50g of force to activate, while you can easily find switches that activate at less than 30g (I used a 37g switch myself).

About travel distance, this is also something you can adjust, with the low profile switches having less than 3mm travel distance.

Heck, even HE keyboards can set their actuation down to 0.1mm, if that's your thing.