I have always enjoyed using https://brilliant.org/ because it's interactive and very informative. Although it's not as interactive, https://artofproblemsolving.com/community offers a great community and valuable resources.

brilliant.org is the site of that sort that's always mentioned at the end of a bunch of engineering channels. I tried it and it wasn't really my thing, but it sounds like just what you're looking for.* I just didn't like it because it's TOO interactive (requiring click after click after click, with many simple questions in between), but it's good for learning something you know nothing about.

Also, ChatGPT is actually pretty good at coming up with quizzes like this. Example: https://chatgpt.com/share/dea5ca58-358c-4030-bb28-fb7706ea35...

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* Here are some referral codes for Brilliant if you want to sign up (no affiliation to me). They all do the same thing, give you a 20% discount and help sponsor a engineering or science YouTuber (of your choice):

https://brilliant.org/practicalengineering

https://brilliant.org/veritasium

https://brilliant.org/realengineering

https://brilliant.org/theb1m

https://brilliant.org/fern