Set the AI rank to pvt and aggressiveness to the first check-box. The low rank will cause Athena to organize very sloppily and the low aggressiveness will reduce the chances of her from, well being aggressive

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Play one game all the way through like that and then set the AI rank up one notch and play the next game. This will gave you a chance to learn how to do things without getting totally overwhelmed. Raise the AI settings each time you feel you are grasping a bit more of how to play so that you are challenging yourself a bit more each time. It's the best way to learn if you make mistakes and then have to fight to correct them.
And don't forget to have fun
