What's the best way for a university student to "grow her money" while studying?

I (19F) will be matriculating into University this August. I have about 16k in my bank account.

As of now, I've been using SCB JumpStart as a way to "grow my money) since they are offering an attractive interest rate of 2%.

I'm considering investing after having $20k in my bank, however, I'm not too certain on that as it is rather new to me. But I'm willing to hold it in the long-term.

Also, if I were to invest in ETFs, do I have to pay taxes?

Thank you!