It is fairly easy to replace. Just make sure you don't loose the wires when you unscrew them from the element. There should be two screws holding the element to the back.
Here is a standard list of what to check. I don't have instructions on how to check each.
* Check timer and clock settings
* Reseat the element
* Test the element
* Test the element connectors
* Test the oven temperature control
* Test the oven selector control