You should check online and see if there are any boxing gyms in your area. You should exercise often and stay in good shape. Finding a good gym or coach will be very important, as you should start by learning the fundamentals. Learn about the sport, who the great boxers are.
Awesome! You have to become an amateur fighter first and foremost (I think you might need 3-4 fights under your belt to be pro). To become a professional at something, mot people recommend 10,000 hours of practice to perfect your work. Definitely look around for gyms and see what one you can do well at. Some gyms don't have sparring or won't develop a fighter, so make you state that you want to be a pro from the beginning.
Running, bag work, and sparring will help perfect your craft and get you read to fight.
Alexandria recommends the following next steps: