I am interested in upgrading my page to the most recent version of Omeka. I am using version 1.3.2 right now but I am worried that I will lose all of my information and work if I upgrade to 2.0 or higher. Can anyone help me with this?
You retain your items and other data when you upgrade. The main thing to make sure of is that any plugins and themes you're using have 2.0 compatible versions.
That being said, you should always do a backup of your Omeka database before upgrading, so you can go back to your old version if anything goes wrong.