Idk. Yet, I have recently found out that some are able to measure Capacitance. I think those are useful, since many times a repair work is about replacing a fat capacitor. But I am quite a neophyte on regards to electronics… Take this with a grain of salt.
This is good advice. Learn about markdown syntax, try Obsidian to write notes that can be interrelated in a network, add drawings, and export selected notes to HTML. You can further stylize all of them with some custom CSS. There are many “content management system” (CMS) like Obsidian does. I’d self host ghostwriter. But just search for a CMS on awesome self hosted list and find something popular that’s akin to you for whatever features or underlying tech (e.g. Wagtail for django web devs)
How about installing RustDesk server con the laptop? Have you heard about Docker and self-hosting? That’s a fun rollercoaster surrounded by rabbit holes ;P GL, HF.