As a new driver you’ll have to take a passenger of your own age for the first time at some point. Just remember that driving with your instructor doesn’t prepare you for chatting with a mate and driving, so your first passengers can help by being quiet and not encouraging you to drive in a way you don’t want to.
Best advice: build up, starting with one responsible friend before carrying multiple passengers.
Again, you’ll probably have kids or a pet as passengers at some point and they are a distraction, so it’s best to wait a while until you are 100% confident. If you do have to drive a child or animal somewhere, remember they’re unpredictable. Make sure they’re securely settled and if in doubt how to do this check online for regulations.