First thing first, you should master frontend skills like HTML5, CSS3, JavaScript, and JavaScript Frameworks like React, Vue or Angular.
Then you can lift your career by learning database concepts, REST API and/or GraphQL. You should not master the node.js but just basic concept will be okay. Learning MonoDB is not necessary. You can use any database query language like mysql, postgres or whatever you would like. You can then learn some frameworks like node-mysql, express.js, etc. I like the adonis.js most.
You should also know basic concepts of web server like nginx, apache. It would be better if you gain some knowledge on git and linux os. And later, you may also learn about docker.
You should not learn all at once. Just go through them step by step. You may find this post helpful.
Happy journey!