Which certification should I learn to start earning quickly?

This resource is what I’ve been looking for. I’m 63 and I’ve been retired from IT for a few years. But I want to get into the Web 3.0 /Blockchain game now. What certification can I attain that could get me started earning income and build on?

freecodecamp curriculum is based on web 2, not 3
if you are interested in web development in general, and are completely new you can start at the top and work on the various certifications. or you can find some web3 tutorials on the publication (freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More) or on the youtube channell (https://www.youtube.com/c/Freecodecamp/)

Like for example this one

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