It was too short for 3 days waiting :)

Agreed...the series is great but the waiting is brutal.

Start with one project and try to finish it. It doesn't matter what the app is, as long as you like working on it. It doesn't have to be original.

Don't build an API. Build something that's actually usable. When you have a public GitHub repo with a link to a live site, that's really good for your resume. It demonstrates you can make something. A single simple working web app is much better than a dozen unfinished projects.

Asking on forums, reading about design patterns, or thinking about making apps doesn't teach you the actual skills you need. You need to write code, lots of it.

but I don't want to start writing the code and then figure out I am missing an important concept

If you think you can learn every programming concept before you start programming, you've got another think coming.

You have to build stuff to learn. Otherwise all advanced concepts will seem abstract and/or pointless to you and you'll be asking the same questions here 5 years from now.

Just pick a tech stack and start building actual apps. Forget all buzzwords, they won't land you a job. What might land you a job is talking about an app you built, and how you solved its problems.

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