You could try this: https://github.com/tianocore/tianocore.github.io/wiki/UEFI-EDKII-Learning-Dev https://github.com/tianocore/tianocore.github.io/wiki/UEFI-E..

You could try this: https://github.com/tianocore/tianocore.github.io/wiki/UEFI-EDKII-Learning-Dev https://github.com/tianocore/tianocore.github.io/wiki/UEFI-E... I don't know of any easily digestible document though.