teen account

There's either child accounts or adult accounts. The age varies by country but in many places is 13 or older for an adult. In that case this document explains how to create a new Apple ID (create an Apple Account) --> How to create a new Apple ID - Apple Support

Setting up a child's account has to be done under Family Sharing and setting up a Family Sharing group for the purposes of monitoring a child's account requires an Apple device. Create an Apple ID for your child - Apple Support