Hi I'm Wondering When Getting A Chip Tooth, A Hole

Hi I'm wondering when getting a chip tooth, a hole in your tooth cause you have a cavity so you eat on the opposite side do now your teeth are chip, crack, discolored and you hate to smile cause of your teeth. I want to get my teeth fix but I'm afraid of pain and I'm scared. I have Delta dental insurance a PPO plan can you help me please.