Hi catty, take it step by step, and you too will be generating great listings.
Just do not do what some people seem to do and that is put out dozens of listings and then realise there is something not right and have to edit them all again.
Mastering all facets of Auctiva's tools takes a little while but if in doubt after the tutorials post a help request on these boards in the appropriate board with a relevant title. Include in your post information what you wanted to do and why e.g. it did not go as planned. It makes replies a lot easier and quicker.