No matter how small your contributions are, you must start saving for retirement now! Time is the most precious investment tool on your side, so the sooner you start saving for the future, the more time you'll have to earn a decent return.
With the rise of robo advisors and other microsaving tools, you can start putting away as little as $20 per month in a Roth IRA or other investment account. The point is to open an account and start putting away something, and create a regular habit of saving money.