There are a couple areas in which you can access your products. One area can be found by clicking the eCommerce link in the left windowpane. Depending on whether you selected to sell "downloadable products" or "physical products" a page will be displayed with the appropriate information and links.
Sell downloads online would look similar to this:
Sell physical products online would look similar to this:
The other area you can access your shopping cart information is in the eCommerce menu in the toolbar.
Import and export products from Excel
Link your product to a full detail view
Update product attributes