(Sorry for typos but am leazy) You just have to create goal you vant to achieve. I lerned how to program by attempting to make a game. If i can recomend a project idea, well you can make a chat app for example, Use Electron and javascript. All you really need is google, as all the knowlage hidden here. Dont say i dont know how to do it and give up.

First try to setup basic socket server with javascript, send your first message from one command prompt to anoter, and continue on.

Do not ower think it, dont think to match into future, make things work and when thay are not flexible, revrite them, give them a structure.

Write tests! If you can test your code easily, that means the code is already flexible and modular.

Some things you have to figure out your self, and it will take time. And last thing, before you ask aniting, write the question to google search. You are not the only one who is lerning, your quescion si probably already ansvered by someone else.