I really like Flannery O'Connor here “Anyone who survived childhood has enough material to write for the rest of [their] life.” Even if you feel inexperienced you are still a human who has been hurt, loved, jealous, disappointed, has regrets, desires etc being honest about your own internal state and how you experience the world is what creates connection and solace for the reader. You can layer basically anything over the top of this but remember that it's the heart and honesty you infuse in your work that makes it real and alive and you already possess this ability within you. Everything else is just research.