Start with the basics of HTML, CSS, and JavaScript. Do NOT get into frameworks, libraries, or extensions before getting a firm grasp of the core technologies of the web. Don't dive into jQuery, or ReactJS, and especially not Angular (if ever). Sit yourself down at MDN https://developer.mozilla.org/en-US/ and go through everything there. Grab a text editor and just load pages into a browser. Don't fall into the trap of just making it work for one browser. Make sure you have at least Chrome and Firefox, and Edge if you are Windows and Safari if you are on Mac.
Seriously, stay away from shortcuts until you have the basics down. Know HTML through 5, CSS through 3, and Ecmascript through 6. If you do this, you will be so far ahead of your peers, you will amazing them with your superpowers.
I've been interviewing people who are so called senior web developers who know Framework X but can't tell me about JavaScript inheritance, or CSS specificity, or what the difference is between block, inline, and inline-block. Frameworks and libraries will come and go, but the basics will be your trusted and loyal friends for years to come.