The first thing you want to do is backup all files within your Joomla!
he second thing you need to do is export your Joomla! database. his step is very important. Go to the folder on your local system to which you downloaded all of your Joomla! files. Using an ftp client application (like FileZilla), upload all of your files to the location on your new server where you want to install Joomla!. Your move should now be complete, but please don't take my word for it. I just came across a resource called JoomlaCloner which automates much of this process for you.
I am getting a new website with Joomla. If i don't like it, can I move it easily to something else later, when I have like 2000 pages?