I have put together a Map Making 101 lesson here: Map Making 101
This is written up as a lesson, not a reference file. So, read through it and follow it step by step to get a feel for NILE. Once you are done with the lesson you will know enough to make maps. You can always come back and read through it if you need a refresher.
There is also a link at the bottom of the list at the left.
Happy Map Making. Let me know if you have any questions.