Hello Bima Aditia,

Your texts say that you have basic knowledge about facebook marketing, In order to make the visitors to buy your products, you should share some of the informative post about products which is helpful and offer discounts to gain more buyers. Keep on sharing new features and reliable products information on the social media websites.

You should share informative post on facebook to attract people for generating business or you can also create a campaign or earn business, but it's paid service.

I would try this