Things I should know as a beginner Web Developer

I am learning how to code and my goal is to become a Web Developer.

I started with a JavaScript course on Codecademy but I have seen people suggest that this perhaps isn't a great approach. I have just begun working through the MDN learning pathway but as I am completely new to this, I would appreciate any advise or steer you could give me on what I should prioritise and I should avoid doing.

Thanks!