What's good is that you need not focus on any area other than your $HOME folder.
Essentially, every user (Linux is a true multi-user operating system) has his/her very own 'Home' directory structure. Here is a terminal list of mine:
dietrich@AOD260 ~ $ ls Desktop Downloads Music Public Videos Documents linux-advocates Pictures Templates dietrich@AOD260 ~ $ pwd /home/dietrich dietrich@AOD260 ~ $
Note, the pink 'ls' is to list and 'pwd' is to print the working directory, in this case "/home/dietrich".
It's all very sensible and as you become more comfortable with Linux, you may get more familiar with how the filesystem works in more detail. But for now, trust, that Linux inherits most of what you see from the venerable Unix operating system. Unix was designed to be secure, safe, and reliable and has a proven track record in the computer industry of doing major heavy lifting production work.
So, whether you come from Windows or Apple or are just a computer newbie, welcome, and know that you have made a good choice with Linux. In fact, most often you will seldom need to go out to a terminal as I just did. I was just being a 'show-off'.
Every Linux Distro will come with its own Filesystem navigation application, like Explorer is to Windows. In my case, I am using Fuduntu which comes with Gnome Nautilus Elementary. Here's what opening the home folder looks like: