why car is not strating

Hello, a diagnostic tool can tell what gear the shift lever is seen to be in. Perhaps it is not engaging "park" fully, or has a problem with the transmission range sensor (which provides that data). Further, the battery could be a concern. Have it tested to ensure it is fully charged and able to handle a load. Also, ensure all cable connections to and from the battery are secure and free of corrosion. That's a good starting point at least.