As outlined earlier on I am playing around with some platforms. Coinbase being the newest one I tried. They offer training videos where you can learn about various coins and earning a bit of the coin by answering some quiz questions correctly. For some you get 3$, for some more.
To double-check your answers I started collecting the answers for the various questions where I was not put in the queue. More answers to follow.
You can find the answers I collected so far here: Platform Coinbase – Earn crypto quiz answers