A 37-year-old wanting to learn computer science

The things described as the goal of the OP are not Computer Science, they're mostly Software Engineering/Development. Even though there is overlap Computer Science is mostly math, completely irrelevant to setting up static blogs or web servers and somewhat relevant to developing applications. A more accurate title would have been "wanting to learn software development and the relevant bits of computer science which help with that"

Was surprised to not see this mentioned earlier in this HN post. Author seems to be conflating software development with computer science.

Making a bunch of apps isn't going to provide a solid foundation in CS which usu. includes topics such as linear algebra, discrete mathematics, calc (at a minimum differential and integral), data structures, algorithms, etc.