Regardless of what you want to achieve with your photography, here are some sure ways to improve your skills without a degree. Familiarize yourself with your camera. You can't become a professional photographer without school or experience. Those who become professionals, at the very least, have a lot of experience to demonstrate.
Taking online courses, internships, and photography workshops can help you learn about photography and develop your skills. However, a degree in photography is useful if you plan to work in photojournalism or as an industrial or scientific photographer. If you want to have a little more stability, you should consider selling stock photos online, teaching online photography classes, or organizing photography courses. Speaking as someone who knows professionals in the field, it's possible to become a professional photographer without going to school.
Online photography classes will give you a basic understanding of the technical aspects of photography.