Hi!
Welcome to Binky Bunny!! Has your bunny got hay as well? If you read the diet tips at the top of this site you will see that bunnies need primarily hay to keep their digestive system going. Since your bunny is young, alfalfa hay and pellets are best, but once she gets to 6 months, then you need to switch to Timothy pellets and hay because alfalfa is too fattening for adult rabbits.
Other than that, make sure you take plenty of time to pet and play with your rabbit. Let her have some time to run around and do binkies, baby bunny binkies are the best! Also, take some time to read all the information on the site, everything will be helpfl at one time or another, and finally, when your bunny is of age, make sure you take her to get spayed. It is very important for female bunnies to get spayed to prevent cancer.
Welcome to you and your new bunny!! What is her name? And what color is she?