Be sure film is wound tightly. Check camera back to ensure that it is properly closed. Do not open camera before film is completed and rewound. Follow the arrow on the rewind crank. Check for obstructions before you shoot a picture.
Fluorescent light gives a more greenish tone.
Try using a flash for indoor shots or a light balancing filter for fluorescent lights. Some cameras automatically adjust exposure for the lightest area. Try using a flash or reposition your subject. If you take a flash picture too close to the subject, the excessive light will cause the subject to be overexposed. Stand-back a few feet.