A photographer needs an artistic ability, one must have an eye to judge what scenery can make a good photograph. To be one, you should:
Choose the right education.
Choose on what photography specialty you will focus on. Focus on one area may it be a portrait, scientific and industrial, aerial, and fine art photography.
Engage in photographic workshops and fieldwork. This can help you explore more technical, creative and logistical aspects of photography.
Take exams for certifications (Certified Professional Photographer; Certified Forensic Photographer; Registered Biological Photographer).