financial

I want to learn functional side of JDE(Financial), as I want to migrate from a technical consultant to techno-functional. I use all the resources, including documentation and UPKs. One my issues is that I don't know where to start. Please guide someone to start with Financial module, like...

I am aware of that inter company settlement is core to JDE Financial module. But my Company need to stop/block all the inter compnay settlement from 2016 onwards. I hope I can do this from P0000 -> General Constants, then set Inter company Settlement to 'N'. As I am having only basic knowledge...