Replacing a heating element is an easy job, once you have the right part!
1.) Disconnect the breaker (or unplug the oven)
2.) Remove the oven racks
3.) Unscrew the 2 screws holding the burner to the back wall of the oven
4.) Using needle-nosed pliers, pull the 2 spade connectors off the back of the element
5.) If you have a multi-meter, check for continuity in the burner, just to verify that really is the problem.
6.) Do the opposite to install the new one.
7.) Cook a tasty dinner!