although not too hard to do, if unsure it would be best to take to a mechanic.
you can do without a lot of things working in a vehicle, but not the brakes.
Brakes are actually one of the easiest things to do on a vehicle...
Couple of tricks to make your job MUCH easier.
1. Invest a couple of bucks in a simple brake spring tool. You'll thank me and whomever you believe in deity wise.
2. Do only one side at a time, so that you can look at the other side when or if you get confused about how everything goes back together.
3. Get a can of brake cleaner spray for each side. Wash down the old brake dust (never blow it with air -- bad for the lungs), then when everything is together, rinse it down again to remove grease and finger prints, which cause hot spots.
4. Make sure that you take your drums to get cut/turned. Almost any auto parts store can do this for fees of $5-15 each. It will take an hour or so to do them, so take them down as soon as you pull off the drums. That way, they'll be done when you are ready to re-assemble.
5. The drums can be difficult to pull off once in a while -- rocking them side-to-side (holding on the rear of the drum and pulling forcefully outward, toward you) will help. Some get stickier than that, and require some amount of force to remove. Don't be suprised if they don't slide right off.
6. Discard the little metal clips that are on the studs, which are only used by the factory to hold the drums in place while they build the vehicle. You do not need to replace them.
7. Make sure you use white lithium grease on the points where movement occurs -- just a dab! The edges of the shoes hit the backing plate in 2-3 spots on each side -- you'll find a raised spot on the front and back edge of the backing plate where the shoes ride. Also make sure you grease the adjuster so that it is free.
8. You do not need any special tool to adjust the brakes. When you put the new shoes on, move the adjusters all the way in, so that the brake shoes are as close together as they can get (with all the parts in place). Self-adjust by backing up the vehicle, and pumping the brake pedal as you reverse. Each time you hit the pedal, you will jack up the adjuster screw one click. Don't overdo it. They'll automatically adjust as you drive.
9. To use the brake spring tool, place the cupped end over the top post (where the springs hook over) and twist it. The spring will be grabbed by the groove in the tool and you will be able to pull it off the post very easily. To re-assemble, use the other end of the tool. Place the groove in the tool over the post, slip the spring over the tool, and pry upwards. The spring will slide up the tool and drop over the post. VERY simple with the tool. You will likely hurt yourself using pliers and screwdrivers... GET THE TOOL!
This is the tool I recommend:
http://www.toolsource.com/drum-brake-spring-tool-bendix-p-71280.html
I've been a pro-tech for close to 30 years and this is all I use...
You can also get one that helps to release the small springs that hold the shoes to the backing plate, but that isn't necessary. Those you can just push and twist with your fingers or a pair of pliers. The "nails" that hold the springs in place have a flatened spot that is wider than the nail, and the little backing plate that holds the spring in place has a slot. You turn the little plate so that the slot is lined up with the wide place on the nail and it pops right off.
If you want a tool to make twisting the little plate easier, this is the one I recommend, 'cause it fits all the drum brakes:
http://www.toolsource.com/brake-spring-washer-tool-p-67178.html
That's about it... I can do a pair of drum brakes (not counting the time to turn the drums) in under 15 minutes. It will take you an hour -- just because you are not used to doing the work.
Also, as long as you do not pop out any of the hydraulic parts, no bleeding is required.
IF stuff looks like it is leaking while you are in there working, find out if it is an axle seal or the brake cylinder. Replacing either is not a difficult job.