Ubuntu, and therefore Mint have a very good base to work with, large community, software installation is good (Synaptic, software center, etc.). Instructions for Ubuntu will work for Mint. I would say it's a very good place to learn. If you're not liking what you are looking at, the way the desktop is working, you can install another one on your existing system (or you can change what you have, move/remove bars, etc., you could make it look almost exactly like a mac for instance, bottom bar, icons, etc.). If you install another desktop environment, when you log out, there is a place to click to get a drop down box, to select the other desktop environment, and log back in to the new desktop. I suggest KDE, I like it better, easier to work with, nicer to look at (my opinion), you could download Kubuntu and use the livecd to see what it looks like, if you like it, no need to install Kubuntu, follow the instructions below to install it in what you have. If you don't like it, you just log back out, and select Gnome or whatever.
Here are instructions to install KDE. I basically did this many times, so I know it works fine, at least it should.... I suggest you turn OFF autologon if you have it on until after you install the desktop and make sure it works (if the desktop would be broken, sometimes it could be tricky to get back out to login to another one that works).
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Here are instructions how to install some common programs in 'buntu/mint.
The Perfect Desktop - Linux Mint 11 (Katya) | HowtoForge - Linux Howtos and Tutorials
Here are a few out of many other distributions to try out, you can try the livecd out to see what they look like. OpenSuse is ~probably what I'd run if not 'buntu, large community and amount of software.
This is a new project, just out with their first release, it has a good base, very promising. But I have not tried it out, I don't know how stable or good it is. Their next release will be better, but not until next year.
DistroWatch.com: Mageia
Another good one
DistroWatch.com: PCLinuxOS
And another good one.
DistroWatch.com: openSUSE
Of course some of them don't work with all hardware. I suggest NOT downloading any of the testing versions.
And if your computer supports booting off of USB, you can use this to download and make a bootable USB drive. It should be in the software center as well, so install it from there.
UNetbootin - Homepage and Downloads