For example:
- How to find and select good shoes.
- How to dig through old historical documents to fact check YT videos.
- How to figure out the age and version (and manual) of an old vacuum cleaner.
Yes, OSINT is a thing, but it doesn't really help
https://ahrefs.com/blog/google-advanced-search-operators/
Start with these
Librarians at some university libraries will teach/assist you in how to better use search resources.