Getting started using inventory module.


I'm new to Sage as a whole stepping in as the Warehouse/Operations manager. Our company has been using Sage/Simply Accounting for many years but have never used the inventory module. As being new to Sage I'm afraid of messing up any other data within the program while adjusting or adding items. I thought I read somewhere to set up all the items in a cloned "fake" company and then import everything after its complete. Is this possible? If not, how do i go about  this without messing up all the current items?

If this is posted in the wrong section, sorry, new to here too.

Thanks in advance.