Rear drums are not that complicated once you learn. Most vehicles are similar. Don't let it scare you, lol.
Basically 4 actions to it.
The wheel cylinder which expands the shoes by hydraulic pressure.
The springs that retract the shoes back.
The emergency brake cable which expands the shoes by mechanical leverage/pressure.
The self adjuster to keep shoes expanded against drum as they wear.
Proper tools make the job alot easier, but the job can be accomplished with needle nose pliers, channel locks and a screw driver.
If I was you, I would jack the whole rear end up, support with jack stands, leave the floor jack under it also, remove both tires. Be extremely careful you are working with a well secured operation to prevent the car from falling on you. People have been killed this way. Do the brakes on one side while using the other side as a guide how to put it back together. Monkey see, monkey do,lol.
Some need to know....
As drums wear, they get a lip on the edge making them impossible to remove untill you back off the slack adjuster gear retracting the shoes a little bit. This is accomplished through a little hole/window on the back side of the wheel directly opposite the slack adjuster gear. You can reach a screw driver in the window to move the gear. One side is left handed threads while the other side is right handed threads. Shine a light in there first to see the gear and threads to retract.
Smooth drums might allow you to remove them without backing the gear off. Never beat on the drums with a hammer as it is cast an breaks easily. A rubber mallet is okay.
Have drum turned if there is a lip on the edge. Replace drums if cracked. Some you might see spider cracks caused by excessive heat. Turning might cut these cracks out.
Any broke/worn springs, leaky wheel cylinders or other parts are readily available at chain auto parts stores. Most of the time you won't need additional parts. Just sometimes on older vehicles.
Make sure everything is clean.
Small shoe pad towards front of vehicle, long shoe pad towards the back.
Mount shoes, cross bar, then springs, emergency brake, then slack adjuster is last.....top to bottom, lol. You have to be strong to expand springs to hook with pliers. That's where proper tools come into play, lol.
Before putting drum back on, thoughly with brake cleaner and let dry.
Expand slack adjuster gear to where you can't put drum on. Then retract to the point where the drum will just go on without force. This will be close enough for the slack adjusters to do their thing while driving.