Do you need an exact replica of your current site or just to copy your content?
If you just need to copy the content of your site, you can export it - tools>export, which will create an xml file you download. Then you can create a new wordpress site and import your content tools>import (you'll have to install the importer plugin) then upload the xml file.
If you need an exact replica and you have little-no knowledge of FTP or MySQL, I would advise you to use a migration plugin.