To use SSH, you must use an SSH client.
There are several out there, but I would recommend PuTTY, which you can downlaod from here.
Once you've done that, enter the details that were given to you in your setup email - there are lots of guides out there.
Mac OS X/Linux Login (Simple way - recommended)
If you're using Mac OS X or Linux, it is a little more complicated.
There are several ways of accessing SSH via Terminal (accesible from Applications>Utilities), and these work just as well. To do this:
1) Open Terminal by going to Applications>Utilities and double clicking on Terminal, or searching for it in Spotlight.
2) Type the following command, and replace the IP with the one you were given in your setup email:
4) If you were succesful, then you should pretty much immediately see a new line of text appear, where you can input your commands. If you were not succesful, then you have entered the wrong password - you will be prompted if this is the case.
Mac OS X/Linux Login (Complicated Way - not recommended)
You could also install PuTTY on Mac OS X, but this is not recommended unless you are an advanced user.
If you wish to do this, first install homebrew by going to Terminal, and writing the following command:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
If you need help with this, please click here.
Once this process has finished, type the following command:
brew install putty
Follow all dialogues on the screen, and you'll be golden. Please note that this takes a long time!
Once this has finished, type putty in terminal, and the regular PuTTY window will appear - see the beginning of this thread if you want to know how to set PuTTY up.