Well $20! Isn't it a great deal when we have alot of FREE online courses available for the beginners.

https://medium.com/quick-code/top-free-online-courses-to-learn-about-cryptocurrency-for-beginners-de83842c601b

Such kind of courses can really be helpful for the beginners in the Crypto world as they tend to train them for the future.

This course for $20 won't be bad deal if it's really worth it!