About my car starting

The diagram is for your starter motor. The battery connections are all good as well as the battery. Have you tried cranking in park and neutral, both? At the starter motor, two voltage circuits, one comes from the battery, hot all the time. The other circuit, goes hot with key in the crank position and starter relay energized. The starter motor should ground through the engine block. Any testing, make sure transmission is in park or neutral and parking brake set. Vehicle can't move. I can only help with testing, you can use a test light. Usually you can bypass, to see if starter motor will at least crank the engine. Remember, make sure vehicle can't move. There are a number of possible issues.