Lots of good advice in this thread.
How you should proceed (how much musical theory to learn, schools, teachers, what kind of guitar and equipment you will need and more) imo strongly depends on your musical interests, the style you want to start off with. If you want to be a classical, flamenco/rumba, rock/punk/metal, jazz, singer/songwriter, whatever player will lead you on different paths to your first paid gig.
I think, you should get yourself the best teacher, that you can afford. He or she can constantly assess your progress, talents and weaknesses and will imho be your fastest track to any success, if you are serious about wanting to be a professional.
Wishing you lots of luck