Okay, boosting posts is fine. But we need a Facebook Business Manager to perform our magic!
Follow these instructions showing you how create yourself a Facebook Business Manager...
How do I sign up for a Facebook Business Manager?
Facebook Business Manager is free to use. To start, first make sure that you have a personal Facebook account to confirm your identity.
Next, sign up for Business Manager:
1) Go to business.facebook.com
2) Click Create account
3) Enter a name for your business, select the primary Page and enter your name and work email.
4) Move through the rest of the on-boarding flow by filling in the rest of the required fields.
5) Add your existing add account & business page to Business Manager.