There a few ways to learn about Crypto online and earn Cryptocurrency for it!
Here are 3 ways to do it:
1. Coinbase Earn

I highly reccomend Coinbase Earn, because you can actually earn a decent amount of crypto with it. This is especially useful if you're just starting out with cryptocurrency for the first time!
through this link you can earn 10$ in Bitcoin if you buy 100$ or more of crypto.
Then follow these links here to claim your free crypto!!
EOS 10$
STELLAR 10$
COMPOUND 20$
Also available: Maker 6$ (MKR) and Celo 6$ (CGLD)
And on top of that Algorand is in the process of being listed and will be available soon!!!
2. Coinmarketcap

Coinmarketcap has in the past had three cryptocurrencies available to learn and earn with, and their Helium (HNT) campaign is now live!
Sign up for Coinmarketcap or get the app.
ATTENTION!!! to be able to take the quiz, you will need a Binance account.
If you don't have one you can signup here.
follow this link to their Helium campaign page
Watch the videos and then take the quiz, I've listed the answers below for you:
Question: What type of devices connect to The People’s Network?
Answer: Internet Of Things (IoT) devicesQuestion: How many IoT devices are expected to need connectivity in the next five years?
Answer: 75 BillionQuestion: What is the wireless technology Hotspots use to provide coverage?
Answer: LongFiQuestion: What is the unit of exchange Hotspots earn?
Answer: HNTQuestion: Which of the below is NOT a way a Hotspot earns HNT
Answer: Providing Wi-Fi connectivity to nearby phones and computersQuestion: What is Helium’s novel proof algorithm that is used to verify Hotspots are real and located where they say they are?
Answer: Proof-Of-CoverageQuestion: What is the unit of exchange IoT devices use to pay for connectivity?
Answer: Data Credits
You will get an email confirming your quiz submission afterwards, and you will be contacted when your rewards will be paid out after the campaign has ended.
3. Bitpanda

Bitpanda currently has a program that rewards new users that sign up to their crypto exchange!
Register on Bitpanda and then go over to their beginner's academy.
Do the beginners test (15 questions) and get at least 80% of the questions right to receive €5 in BEST tokens.
(You can take the test as many times as you want!)
Unfortunately, I can't provide you with the answers, because the questions change each time you take it.
The €5 can afterwards be exchanged to any coin you like and then withdrawn to your wallet!
Thanks for reading and I hope you'll be able to claim lost of crypto in the Future!