Yes, I agree with this. The OP seems to be OK thus far, because she doesn't seem to be close to her family (DC and grandchildren.) and isn't arsed about getting pictures of them. And she seemingly doesn't have to deal with trains, buses, and car parks. As you say though, it sounds like a small, closed, restricted world for her.
And at 58, I find it very odd for someone to not have a smartphone, and modern tech. That is very young to be out of touch with tech. Everyone I know under 65 grew up with the tech we have today. Computers have been around for some decades, and the internet (as we know it) for over 25 years.
Smartphones have been around for about 15 years, so the OP would only have been in her early 40s when they became a thing. And the internet has been around since she was in her mid 30s. Mobile phones even longer.
I am surprised she is even using the internet to be honest. And yes, if I was her, I would be worried about my already small world shrinking even more, as so much now depends on a smartphone. I am laughing at how the OP says her husband has one though, so they 'use that for things.' So she has got access to a smartphone then. So it's not true that she is totally without one anyway.