Ask Brianna: How do I save for retirement at my first job?

"Ask Brianna" is a Q&A column for 20-somethings, or anyone else starting out. I'm here to help you manage your money, find a job and pay off student loans — all the real-world stuff no one taught us how to do in college. Send your questions about postgrad life to

This week's question:

"I'm starting my first job after college, and everyone says I should start saving for retirement already. Should I? How do I do it?"

One day you will be old, and you will need money. That's hard to absorb when you're young and healthy and rightly concerned with curating a compelling...