As you progress toward Eagle Scout, you will pass a couple milestones.
The first rank you will earn is called Scout. It is likely you will earn this within a couple weeks of crossing over. After Scout is Tenderfoot, this rank requires a little more work and can be earned within a few months. The Second Class Rank can be completed by the end of summer. The First Class Rank will be next. Camping at Heritage Reservation helps to speed advancement.
As a First Class Scout you can be a Den Chief.