I recommend a Haynes or Chilton repair manual or a dealer factory type repair manual.
Changing oil is fairly easy.
Put a pan under the drain plug - take out drain plug.
If you are also going to change the oil filter - remove filter, coat seal on new one, install it.
Put drain plug back in. Add proper amount of oil. Run engine, check for leaks.
There are marks on your oil dipstick for empty and full - take a look at them , before, during and after oil change.
This is the simplified version of an oil change. Not too much to it.