Just as you are learning to become parents, your parents are learning to become grandparents. Your parents are working out a style of grandparenting that feels right for them.
Some new parents are delighted to receive help and advice from grandparents. Others find being around grandparents stressful. Remember that this is your baby. You have to parent in your own way. This may be different from the way your parents raised you, and it may be difficult for your parents to accept this.
Talking about your feelings is the best way to get along with each other.