Hi Claudia and Welcome to the forums. Photos are your first and only real chance of grabbing buyers attention. The clothes really need to "POP " . This means colour contrast and showing off the clothes shape & style. The Laura ashley skirt worn by your model looks much more attractive then just lying them flat on the bed etc. or hanging them against the pale wall. As others have mentioned a manequin is better than nothing for showing shape.

 If you dont have a good background to photograph your clothes against, a  simple trick is to go to a sewing centre and buy a couple of metres of different coloured fabrics. If you must photograph your clothes lying flat on the bed, you can contrast the background fabic colour to the clothes to get a much bolder image. The fabrics can also be strung along a wall or even hung from ther clothes line to give a background contrast when a model is used.

My school aged daughter sells clothes on another site instead of working a weekend job. She models them herself on our porch / deck area where we have a nice, large  green standard fig in a pot. She often just gets the green leaves in the edge of the photograph, along with the yellow cream coloured weather boards of the house. This breaks the photo up and provides more interest and style than just a blank, pale wall.

If photographing clothes inside, she uses the fabric backgrounds mentioned and a proffesional photographers light with adjustable intensity to give a soft glow, rather than harsh lighting. The light was purchased from an op shop for $20.00

When starting out I returned all profits from my ebay sales back into purchaseing more stock. If you can get your stock / listing numbers up it gives potential buyers more items to look at when they visit your ID and more potential sales. A wide range of stock also looks more proffesional and you may build up a band of followers / repeat buyers this way.

FEEDBACK - you only have a feedback score of ten at the moment. You may meet some buyer resistance until you can get your numbers up at least to 30 or 40. After that it wont matter much. The quickest way to do this is to buy a few cheap things you need around the house, particularly from Chinese sellers, as they regularly leave feedback. All the best with the new venture.