Omarli72, Follow the steps below:
1. Build your store
2. Add products
3. Edit product description (try to write a good product description with good quality images and "keep it simple")
4. Find the target audience for your product on FB.
5. Decide a budget and run ads for at least 3 days.
6. Seek help online as much as possible
7. Do not give up until you start making sales regularly.