My first recommendation, buy a shop manual! They are inexpensive, and will more than pay for itself in mistakes not made. Online information is good, but nothing beats having verified facts in hand while you work on it! Read it cover to cover, get yourself into the mind of the engineers of yesterday!
Before you try to start it, crack all the drain plugs loose, see what you get. If it's been stored outside, real good chance it has water in the cases and engine. Letting it drain out before starting will be much easier than after it is emulsified into the oil. Don't drain the oils yet, just drain the water off the bottom.
Also get some oil in the cylinders. Pull the plugs, give each cylinder a few squirts of oil. Hopefully it is not stuck!
Keep in touch, let us know how it goes. Ask all the questions you want.
Our goal is to keep them out of the scrap yards!