I find keeping my fingers on the home row quite unnatural and prevents me from typing chords with Ctrl/Alt and Shift. How have folks overcome this?
I wouldn't be too hung up on how it is taught. Once you learn the essentials and can type a sentence or so without looking, then you'll be fine. Personally, I just watch the screen and correct and make slight hand position adjustments without looking down at the keyboard. The fun trick is when somebody walks up to my desk to ask a question, and I continue typing whilst engaging in their conversation. It is sort of a file-write-flush for me, to capture whatever was on my mind when I was interrupted.
I can type around 60-70 wpm with non touch typing. Same as you, often have to correct things with Backspace.
I rarely use my pinky. But with touch typing I have to use it more and it feels very unnatural.
When I have to bang out emails or any other form of text for work, I can't see myself slowing down to force sticking on the home row to learn touch typing.
I can practice in the evening. But then you essentially keep using the 'bad' way of typing while also learning the good way. Seems confusing.
ctrl and shift heavy flows are a remnant from ibmpc / windows era and suck for ergonomics, unfortunately. Most people realise just how much more comfortable cmd+ is from using a mac. You're holding the thumb there anyway, might as well make use of it.