Books could be written on engine swaps.
Several tips from my experience.
Get a bunch of baggies and some labels. Put everything(sets of things that go together) in its own baggie and label it for later reinstallation.
Photograph every step you take if you can. preferrably with a digital camera. It will help when you do the reinstall.
Take copius notes and read them.
Clean, clean, clean...everything should be as clean as you can make it. Including your garage floor. And clean as you go. Lots of dirt and oil and stuff will fall to the floor.
Engines are best removed with 3 people. You can do it with 2 or one, but since you have not done one before, get a couple of buddies to help.
Make sure you have everything before you start like fresh oil, filters, hoses, tubes, whatever. Tools too. You will need metric. Full set of combination wrenches, Same with a 3/8 drive socket set. I don't think you will need anything special that way. Usethose thin rubber gloves. They will save you a lot of filthy hands. Short and long screw drivers, pliers, vice grips, knife. Trips to the parts store for various things will vastly slow your progress
Plan. What all are you going to change? Plan it and stick to the plan. Make a detailed list of changes. Spend a half hour or more with your friends before hand looking at it and figuring out what has to be done. (How will you handle the a/c, what about removing the radiator, where will you put the coolant, etc) We all run into socpe creepthat can make a weekend job last months. Are you just going to change the engine, or will you change the clutch/converter too? Headers in the picture? Then how will you get new pipes and mufflers on it? Etc, Etc.
Get an engine stand for both engines. They will both be out for a while and you will probably want to migrate some things from the old to the new. It's easier to do the switch with both engines out.
How's that for a starter? These kinds of thikngs can go on forever. But stop for breaks. particularly if you get tired or it stops being fun. Many things about cars are dangerous andyou don't want to hurt yourself with carelessness.
Enjoy your first one.