First: Find a friend that knows how to change tires and get some help to teach you.
Cut the sides out of a gallon plastic milk jug to use as rim protectors. Pull them out of the rim with pliers. You will not find better rim protectors than thin tough plastic sheets.
Saw some 3"x1x2 wood blocks to space the tire bead in the center of the rim while you work on the opposite side. Jenga blocks work also. This might ease a tough install (they're all tough!).
Buy different steel spoons. My favorites are some forged and knife edged ended flat, one end straight and the other curved. The thin ends ease slipping between the rim and the tire bead. You need at least 3.
You need a tool to remove the valve cores from the tubes. Buy valve caps with the little tool formed in the top but don't use them on your car.
Use lots of lube in the right place. Get some Ru Glyd if you can. I use soap and water and spray furiture wax. I can't stress enough how much the lube is needed.
Get some talcum powder to lube the tube and inside of the tire. Baby powder is a good source but try to get unscented and DO NOT get corn starch. Buy talc.
Change the tire on a hot sunny day with the wheel in the grass on a blanket. The soft ground protects the wheel while you struggle with the tire change.
Hot and sunny! Set the wheel and new tire in a driveway in the sun to get good and hot. The rubber seems to get more workable when hot, and believe me, you'll need the extra workability.
Don't drink the beer until you are finished. If I had a beer for every time I got drunk before the job was done... Hey, wait a minute!
These are just tips rather than full instructions but they are gold. You Tube probably has plenty of videos that are better than me writing a book. Be aware that the tires you use for street are much tougher to change than knobbies in the video.
Tom Graham