For me there are different components to learn. A new base layer layout, like switching from QWERTY to COLEMAK, can be efficiently learnt with online typing to

For me there are different components to learn. A new base layer layout, like switching from QWERTY to COLEMAK, can be efficiently learnt with online typing tools. Keybr[0] is a good start as it records the relative miss rate of each letter and prioritizes the lessons after that. After that I personally moved to Monkeytype[1] as it has tons of configurations you can play with. I got back to ~50 wpm in under 10 hours of deliberate practice using this technique. Numbers and symbols you can do the same. Monkeytype has modes for that so you can target them specifically. Other "big" keys like Tab, Escape or Enter are so common that you'll learn them in no time. As for layers and other advanced techniques, it takes some getting used to. For me the first week felt really bad (even though I sort of knew the base layout), and I tweaked things for ~3 weeks, but after that it felt fine. The productivity will take a hit, but it's not noticeable after the first month I'd say. And I still use a regular keyboard with QWERTY on the laptop, and I can switch to it on the fly. (Even between US and Swedish layouts, which have almost all the symbols in different places.) Oh of course, you should always touch type. If you're having trouble, just use blank keycaps.