Sure, there’s plenty of content online.
No need to remember anything, because everything is just a search away.
You can, with some intent and dedication, do a decent job at most things.
And I anyway believe that enrolling in a course and earning a certificate is still worth it. At least, for what really matters. For what can get you closer to your purpose.
If for no other reason, for the people you get to know that are going through a similar journey, willing to share what they are trying and you have not yet thought about.