I'm also a beginner and I noticed that debian let me install a lot of possible desktops. So I installed all of them, and I can switch on the password screen which one to open. I'm trying some stuff this way.
I remember trying Ubuntu Unity, back when I was wondering if I could be a good idea to switch Linux. But I had no patience at the time for the buttons on the opposite side of the window. I can't stop thinking that if it wasn't for that, things could have been quite different.