I take it that you have never worked on drum brakes before. There is a simple spring tool available at your local parts store. The problem with the job is to get the parts back together correctly. Take a picture of each side, labeled as to which side it is. Don't mix parts from one side to the other because the adjusters are side specific. If you are unsure of your abilities, get a friend with gray hair to show you how it is done the first time. However, it should also be reasonably priced to get a shop to do the cylinder replacement. Of course they will tell you you should do both sides, and that the shoes need replacing. Nether is really necessary. The shoes can be washed off well with a garden hose.