The code people want to know if you know anything about plumbing and if you can show them how you will run the pipes; both DWV and water supply.
There is no short course that will get you past the code guys. I agree with Inspector D, you need to go to the library and spend some time with several books. It would be easy for me to draw the isometric for you, but it wouldn't help you answer their questions. I would be happy to help with answers if you have the questions.