Once you've created your store account, you can begin uploading products! In the navigational menu on your Dashboard, hover over products. Choose the drop-down option product listing - this will bring you to your products page. Click on the blue button ADD PRODUCT near the top of the page. Here, you can add all of the information needed to list your product.
If you'd like to delete a product, go to your product listings page and choose the product you'd like to remove. On the right hand side of the product's information are three dots. Click on the dots and select the action you'd like to complete.