There is a saying: "There's no place like /home." (Those who are are familiar with Ubuntu will get this, sort of a, joke).
Did you perhaps try to reach Home folder? Maybe through the Dash? … If not not, no worries.
If you come from Windows world, Home folder label may, but it doesn't have to, be strange to you. So, to ease the transfer from Windows to Ubuntu I will compare Ubuntu's Home folder with Windows 7 Libraries folder appearance.
If you use Windows 7 starter for example, when you click on Libraries folder you should see something like shown on figure 1.
Figure 1. Windows 7 Libraries folder, (photo courtesy albanylawtech.wordpress.com)
Under Libraries folder are some empty subfolders namely: Documents, Music, Pictures, Videos. These folders are there to help you organize your files. You see, Libraries folder is to Windows 7, what Home folder is to Ubuntu.
To open Home folder under Ubuntu first what you have to do is left click on a Home folder icon on a Launcher as shown on figure 2.
When you opened your home folder you should see its appearance as shown on figure 3.
Try to compare figure 1 and 3. I hope you have noticed that there is no big difference between them. They are both main folders and have some empty subfolders underneath them so you could organize your files easier. This was a brief introduction to Home folder.
In the next article I will cover Ubuntu software center.
Don't be confused if I skip some Launcher parts. I have a good reason for that. You see, it is good to bring you just crucial parts of GUI at the beginning. After crucial parts are done, there will be some extensions like what applications might be useful to you. I will try to compare them, in shortly, with proprietary applications just to make your free and open software adoption/transfer easier.