

That is a real problem which is why a smaller (or even a “mini”) version of phones does matter. Keyboards can be adapted to be smaller, which can be helpful (but gets clunky when I have tried using those options from one-hand typing to two-hand adding steps). It does seem like the options for folks like yourself are an afterthought that leads to having to pick between being comfortable or having all the features and uncomfortable. Apple is basically the only OEM that has real options in both smaller and larger sizes without losing as many (if any depending on the year) features.
I have been using Samsung phones since the S3 and while I personally like the larger ones, I do have a friend that has also had their phones about as long as me. And he always gets the non-plus version of whatever the S series is out when he upgrades due to liking the smaller size (similar to your experience). But I know he would love a small version of the Ultra for the extra features, but don’t see Samsung doing that anytime soon. Which sucks given how much they try to be the “Apple” of Android devices.

True, especially the part about your mom and others that had to use PCs in the 90s and 80s. I suck with a lot of CMD/PowerShell/Terminal stuff and get really in my head about whatever I am doing. Though a lot of it is due to things like switches and formatting order. Can be very very frustrating if there are a lot of them and having to constantly look at what they mean since they aren’t just regular words (which would obviously make the amount of typing get out of hand). The other main issue for me is dealing with moving or copying things around. GUI is much easier to get due to being able to see it in the same way I would move/copy things IRL. Especially frustrating if using USB drives, since they don’t just auto-mount/assign a letter if only using something without a DE. That part is (for me) a headache to have to deal with since the same OS will just do that if a DE is used. But also not something I do every day (or very often as I mostly use Linux when messing with my Pi).
But your core point of just doing it is very true. The reason that folks in offices in the 90s and 80s were able to get used to it was because they had to, and that there was a reason to at least know the things to do what they needed. They didn’t have to get bogged down with all of it (or even need most commands). So it would be best to focus on the things that are needed to get daily things done. Then it makes a lot of other bits easier to handle later on. And a lot of common things can be printed/written on cheat sheets or getting stickers with common commands to put on the side of the case or stuck to a desk in easily glanced at locations.