I've found a great tool on mastodon with which you can test your privacy awareness - privat-o-mat.
You can change the language from German to English at the top of the page.
My privacy weaknesses are:
- payments: I like to pay with my giro card so that I don't have to write some sort of household book to manage my finances
- shopping: I do online shopping instead of offline shopping
- (dating apps: if I wouldn't have the best wife in the world, I would give a dating app some personal details)