Creating shopping cart for downloadable products on wp

I have a wordpress blog and want to sell some products. I have downloaded e-commerce plug in but can't seem to get the page formatting correct or the functionality as I want it. I am looking for someone to create the products page, so the sale can be processed with paypal/google checkout. There needs to be a shopping cart option and each product will have a separate download page. I also need the buyer to be directed straight to the download page (download pages are ready to access) after payment. I will provide all the text, product descriptions etc. Will be adding further products so possiblity of longer term work. I may not have expained that incredibly well so please feel free to message me with queries:)