Run by run on android building

I have a problem that I have been having with building 64 bit games with unity (this is required to upload games onto the play store). I have tried using IL2CPP backend, as well as using ARM64 but always come up with errors. I was wondering if someone could just write up an answer which contains all the instructions required to build an android project which will be accepted by Google. Unity editor version: 2019.3.0b7