@fonts Try this to start:

fontbakery check-universal --html report.html *.ttf

Then open the report in your browser and look for warns and fails. Most of the other checks (fontbakery --list-subcommands) are built for specific foundries, but you can try them, too.

I learned the basics from a workshop with Mirko Velimirovic. His notes from the workshop might be useful: https://github.com/bghryct/TheGreatFontbakeryShow