Go to reddit. Search for subreddits for excel and sql. There's plenty of links to get you started on practicing. This will help you build the technical skill.
Whether you do analytics in finance, sales, HR, accounting... the stories you tell from the data may be different, but the technical skills are going to be very similar.
Finally, don't pidgeon hold yourself to thinking you only want to do one thing. I know plenty of people that wanted to be an account, lawyer, doctor, etc... and many of them now do something totally different; successful people too. You're young. Explore lots of different things!
I wanted to be a software developer. 2 semesters into college I quickly found out I hated it. Keep learning many different things. That way you won't feel "stuck" into a specific occupation.