There are many platforms dedicated to the teaching of Blockchain technologies. Lots of good other regulars. But I am particularly interested in basically 2 types of curious: Those who teach you about cryptocurrencies and the blockchain environment, orienting you to trade, and others who teach you the fundamentals, technical data and guide you to be developers. This course is of this modality, it gives you the bases for you to start in developments under the blockchain platform. In this course you will learn the fundamentals of bitcoin and smart contracts on the ethereum platform to create decentralized applications.
The course is free without prerequisites and if you want to certify it has a cost of 99 dollars.