Yahoo Store Converted to osCommerce

Hi, I created and run the e-commerce website [login to view URL] (over 2,000 items) and would like to not use yahoo stores any longer after hearing about osCommerce. The problem is I have no idea how to use osCommerce, and have no experience with it (i know nothing about it). I made the site using a fairly simple Dreamweaver template. I have all product information in six different excell groups depending on sport(ID, Code, Description, Sale price, list price), all pictures in folders, and you can download the template if you want to see how difficult/easy it would be to convert. What I would like done: -Convert the site to osCommerce -Make sure items are still orderable after conversion -Suggest a server to host the page (my domain runs out I think next month and I don't want to use Yahoo anymore) -Make sure the shopping cart will be compatible with PayPal Pro -Still be able to edit pages (since i have no experience with osCommerce you'd need to explain this to me) Optional (we can discuss this): -Make the pictures expand to 500x500 either in a new window or on the page(I would send you each picture in 500x500 format) If you have anymore questions please ask.