Your fingers are the long thin parts at the end of each hand, sometimes also including the thumb.
e.g. John was about to speak but Maria raised a finger to her lips.
Your face is the front part of your head from your chin to the top of your forehead, where your mouth, eyes, nose, and other features are.
e.g. Jane had a big smile on her face.
Your chin is the part of your face that is below your mouth and above your neck.
e.g. Laura sat behind the table, her chin resting on her hand.
Your forehead is the area at the front of your head between your eyebrows and your hair.
e.g. Sarah’s got a high forehead.
Your cheeks are the sides of your face below your eyes.
e.g. Patricia kissed him on the cheek.