https://www.facebook.com/business to schedule an appointment with an FB expert to help setup stuff like pixel.
If you are getting problems with Pixel or just want to check than add the extension for Chrome in your browser and it can give you diagnostics on teh pixel. https://developers.facebook.com/docs/facebook-pixel/support/pixel-helper
Had a few issues with my Facebook ad settings you can't have ads not allowed on your face book settings and get analytics from ads you are running, so I have had to allowed all ad data on facebook. I noticed that the pixel data was a factor of 10 less than the website traffic reported, and install pixel helper to see what was going on and follow its advice.