So here are a few best resources to learn blockchain for free!

Blockchain and Deep Learning: Future of AI – https://www.udemy.com/course/blockchain-and-deep-learning-future-of-ai/

Introduction to Cryptocurrencies and Blockchain – https://www.udemy.com/course/introduction-to-cryptocurrencies/

Blockchain Technology – https://www.edx.org/course/blockchain-technology

Blockchain and FinTech: Basics, Applications, and Limitations – https://www.edx.org/course/blockchain-and-fintech-basics-applications-and-lim

Enterprise Blockchains Fundamentals – Free Course – https://academy.101blockchains.com/courses/enterprise-blockchains-fundamentals

Blockchain Basics – https://www.coursera.org/learn/blockchain-basics?ranMID=40328&ranEAID=JVFxdTr9V80&ranSiteID=JVFxdTr9V80-1r8UgE1ELmO1X4UErWJTGg&siteID=JVFxdTr9V80-1r8UgE1ELmO1X4UErWJTGg&utm_content=10&utm_medium=partners&utm_source=linkshare&utm_campaign=JVFxdTr9V80

Ethereum Development Course – Blockchain at Berkeley – https://www.udemy.com/course/ethereum-development-course-blockchain-at-berkeley/?ranMID=39197&ranEAID=JVFxdTr9V80&ranSiteID=JVFxdTr9V80-wyO2zodfVZ7qa7ZTKF2urw&LSNPUBID=JVFxdTr9V80&utm_source=aff-campaign&utm_medium=udemyads

Learn – Earn – Enjoy : Best of luck❤️🙌