Gathering install data (tracking conversions) from Admob and Facebook Ads. Help?

Our marketing division is requesting that we gather data from installs from users that went through Admob banners (both on Android and iOS) and Facebook ads to reach the game's store page. I sincerely have no idea whatsoever on how to do that.

I've found docs on conversion tracking for both Android(https://developers.google.com/app-conversion-tracking/docs/android/using-sdk) and Facebook(https://developers.facebook.com/docs/marketing-api/offsite-pixels/v2.2), but it looks very complex and different from my usual in-game assets and C# scripts.

I'm guessing I'll have to take a shot on Manifest files and maybe even Facebook GRAPH programming, but I really don't know even where to start. Any help is appreciated!