Congratulations on joining the Funds! The habits you form now will set you up for the rest of your years.
First things first: make sure you understand how the Funds work, your benefits and where to see your Fund value. Contribute as much as you can each month.
Now, build a credit history and learn how to manage your debt. It is through strong and reliable credit habits that you can make educated large purchases and take out loans for the house or new car that you may need very soon.