You do not need an ebay store to get an Auctiva store running.
An Auctiva store simply shows what you have on ebay in a different and visually more custom manner.
The Auctiva tutorials are a good place to start.
The lounge is not a good place to ask specific questions, it is better to use the boards specific to your problem where regulars hang out to give words of wisdom to all on their particular specialities
p.s welcome to you both