But there are probably quite a few women of my mother's generation (just off 70) whose husbands die and they have to do lots of things for the first time. (Had my mother died first, there would have been a ton of stuff Dad couldn't have done without being shown how, too.)
Mind you, some cars are badly designed - I had one where you had to dismantle half the stuff under the bonnet to change a lightbulb. My current car is like that for the battery, but at least that is less likely to need replacing than a bulb.
On balance, I am not against the course per se, at least to see if demand is there, but it really is very basic; I should have thought something with a bit more detail would be better.