Hi, welcome to NICO Club!
We have the FSM that you can view or download here:
http://www.nicoclub.com/archives/nissan ... nuals.html
That will have instruction on body panel removal. It shows you where the clips, nuts and bolts go.
I'd look at a junkyard for parts first, then ebay used stuff. Bodywork is tedious. You want stuff to line up nice and have a good color. Have fun and take your time.