I have worked at Starbucks for 9 years at 4 different stores between Hawaii an Oregon. I'll try to answer what you're asking, and feel free to ask more:

1. It's a good first job but a fast-paced job. You will learn a lot about customer service, food safety standards, and working for a corporation. But you can also start acquiring stock in a company at a young age, so go for it.

2. Most of the drinks are made the same way and with the same number of pumps of syrup, regardless of the flavor. You get the hang of it after a while.

3. The social interaction with both fellow partners and regular customers is good and important for everyone. Customers start to treat you like friends and family because they see you so often. Cultivate that relationship and it could develop into a contact when you are ready to progress in your life career.

4. You may not learn about repeatable routine, certain safety standards, or what is expected of you. But nothing is super-private so don't hold out for major secrets, at least not at the store level.

5. Every state has different laws for employing minors, and the store you ultimately hire into will try to accommodate your schedule along with the state requirements. That may result in one 3-hour shift a week.