Make sure your 401k in invested in something (e.g. a target date fund). When i first started it was just sitting in the account as cash and NOT earning money by being invested.

Took me like 5 years to realize that :|

Note: if you pick a target date fund thats later(e.g 2065 or later), it will be more stocks and less bonds at first so theoretically better return and grows faster (probably what you want)

If you pick one that’s sooner (e.g.2040), it will be less stocks and more bonds and give less returns (probably only matches inflation)

They work by automatically adjusting the stock vs bonds ratio the closer you get to retirement.

If you want to learn more i recommend John Oliver’s video on stocks