Hello Creative Cycle,
Welcome to the world of ExpressionEngine!
I will do my best to help you with your project.
Here is my suggestion. Duplicate your site and do so locally. To do that, FTP all the files down from your production server to a local one. This could be a computer you setup just to host a duplication of your site or even on your local machine. I run one on my Mac using MAMP, if you are on windows you can use VMWare Player and download an already built Virtual Machine (VM) from somewhere like TurnKey which provides a nice LAMP stack ready to go right out of the box.
On your production server, export your database. Then FTP that down to your local install and import it into a new database. This document will have some helpful tips for folder permissions and such. It’s on moving to a new server with ExpressionEngine, which in your case you are doing only instead of moving, you are duplicating.
Once this is up and working, you can take a snapshot of it and have a point you can always roll back to if anything happens. Now you are free to update, upgrade and try new things without effecting your production website.
If at any point you run into a snag you cannot work through, just post here and I will help.
Cheers,