Before we dive in, let’s talk about that focus

It can be pretty tempting to want to dive right in and cover the full spectrum of a full stack developer, but there’s something to be said about focus. This is the basis of the expression “jack of all trades, master of none,” where you try to learn a little bit of each part of the full stack and never really master anything.

So what should I learn?

If you’re truly a beginner, take the time to learn basic HTML and CSS. It might not be as fun and attractive as digging right into Javascript, but building upon the fundamentals of what makes the web will be key to starting off on the right foot. Next, learn Javascript. It will remain king for the foreseeable future. Javascript will provide the basis of any framework or library that you build upon, so getting to understand how the bits and pieces of the language itself works will help propel you through your journey of learning the front end side of things. It will also make your life easier when you’re trying to understand some of the complexities of different patterns and the concepts behind the frameworks you’ll use.

For a complete read: https://www.freecodecamp.org/news/how-to-become-a-full-stack-web-developer-in-2020/