Welcome to our dropshipping community here!
Oberlo is an app for your store that lets you import dropshipped products to sell. To use it, first you need to sign up for a Shopify store. Shopify offers a 14-day free trial at Shopify.ca so you can test it out and get your business going.
Once you sign up for a Shopify store, you can go to the App store and download Oberlo. You can start browsing and importing products you'd like to sell from the Oberlo marketplace right away.
Here is a guide to getting started that covers all the basic information. However, if you have any questions or difficulties along the way, feel free to ask us in the forums here!