Getting tournament experience in order to improve your game mentally and physically is a must. You wouldn't tryout for the volleyball team without ever playing an organized match, would you?
Here are places that you can begin to get some experience, or build on what you've already done. And remember, it's not about what you score, it's about what you learn, and your development in overcoming adversity by persevering.
Colorado Junior PGA https://juniorgolf.coloradopga.com
Summit Junior Golf https://summitjuniortour.com/Home
Gold Crown Junior Golf https://www.goldcrownfoundation.com/golf-programs/
There are also junior golf leagues all over the city. Both public and private courses offer spring and summer opportunities. Check out a course near you!