Tutelage is like having a big brother or sister look out for you and teach you how to do things. Imagine you are a little kid and you want to learn how to swim. Your big brother might help you put on your floaties, hold your hand while you practice kicking your feet, and explain to you how to blow bubbles underwater. This is like tutelage - someone who knows more than you do helps you learn and grow.
Tutelage can happen in all sorts of areas, like sports, music, or school work. For example, if you wanted to learn how to play basketball, your coach might give you special attention and show you how to dribble, pass, and shoot. Or if you were having trouble with your math homework, your teacher might give you some extra time and sit down with you to explain the concepts in a way you can understand.
Overall, tutelage is like having a supportive and knowledgeable person guide you and teach you new things until you can do them on your own.