We have had countless beginning writers submit their work, follow the guidelines, and be published. We encourage new writers, and welcome them. I've had several writers say that their friends or families have encouraged them for years to enter their work places, and this if the first competition they have entered. I am honored. In return, they have followed my guidelines, and I appreciate that.
Competitions can be wonderful.
They can boost your resume, and give you credits that will stay with you throughout your career. In the same turn, do not let them effect you mentally. You have to know when you enter a competition whether or not you believe in your work or not. If you believe in your work, then losing and even winning, can mean something entirely different than if you are waiting for a win to validate you as a writer. No one can validate you and your work.