How should I learn about file system structure and network in linux as a new bie !?

I recently got into arch linux , as an 19 year old and cs major I'm really curious abt computers . haven heard about linux and the customization feature . I started liking it , previously I was a windows user .. it used to get lag in blw so slowly I got switched into linux and it's almost been 2 months . In the beginning I do not have idea .. wt the window managers are so I have given a chance of trying different wm so I tried cinnamon , i3 wm , xfce , sway , swayfx , KDE, hyprland .. in this process I was so much fascinated abt hyprland .. and thought of configuring it on my own. But failed to understand the config files so I switched to some git config files which were pre built like Hyde/hyprdots and now currently just trying calestia(from git) just to understand how they work and how can I config mine.. and got a slight idea about the file structures but not completely .. got hands on some commands in linux .. previously I used chatgpt for installations .. it literally troubled me a lot .. and I was spending days completely on this linux.. haven't code anything like I am a 3rd year student learning dsa and java fullstack .. so I even don't wanna loose flow with coding as well as eager to learn linux .. so , I want to know

1. how should I start with!?
2. how should i learn configuring !?
3. How tough it might get !?
4. What tools i need to use?
5. Any further suggestions !?