I'm a 67yo woman who has bought a modest little 2 BR ranch built in '58. It had no shower, so I'm tiling around the tub and adding one. I'm replacing old galvanized pipe and shoddy copper with pex. I had hoped to move in by now, but find I work more slowly than I used to. But I'm enjoying doing it (most of it, anyway).
Congratulations on the house. Homes built during that period were solidly built.
A few typical problems that you have run onto ,I'm sure,are poor insulation,tired plumbing,under sized electric service,conduit hidden under the flooring--Still very satisfying to look back at the end of the day and say,"I did that".
All those things. There was a row of service boxes in the basement from tiny to big, complete with some glass, screw in fuses. I now have just one new shiny one. That was one of the things I hired a pro to do.