An important step to achieving any goal is to make a mental commitment to it. But the first step is to set a realistic goal. You don't have to give up your car cold turkey. Maybe start by promising to ride your bike to work one day a week. Later increase that to two or three days a week. That gives you some flexibility to adjust your biking schedule based on the weather and how you feel.
Forty percent of urban travel in the United States is within two miles of where people live. This means much of our daily travel could be by bike, and Yolo County's terrain and weather make it easy to bicycle much of the year.