[Journey] Reskinning apps with reverse engineering for 100$/day

Good luck

what information in the apk do i need to change to make it my own and show my ads etc

Environment variables, you may have API keys and other credentials, code changes to communicate with backend, for Google Admob, the integration is quite easy, for each ad style, they have a publisher unit id, you would just add your own and of course the UI would need a good updating