Many factors will influence your decision in finding a teacher. If you are flush with money, then you might consider enrolling at a famous university or Conservatory anywhere in the world. Of course, you will have to go through a competitive entrance exam and only a fraction of applicants will be chosen. If money is a big factor, and you haven’t the necessary qualifications to enter a university or conservatory then your only route is to obtain private tuition. If you are living in a large city probably you will have a choice of teachers. If he or she is a principal of a big orchestra, that is a big plus, but I do urge you to go to a concert to see them in action and whether you like their style of playing. Believe me, style is a big thing, a good style of playing increases your earning power.
If there is a youth orchestra in your neighbourhood join it. They usually have professional coaches who give invaluable advice, and you will also get to know some of the orchestral repertoire. There are good amateur societies in most big cities.where you can gain experience.
If you are diligent with your studies and practice hard this probably will be noted by your teacher and you may be offered the odd date or two.
But how do you keep the wolf from the door when you are studying? I know of some students who obtained either a plumber’s ticket or an electrical ticket, becoming members of the new artisan aristocracy and being able to pick and choose from any free lance dates that came their way, and of course, there are the usual “Joe” jobs out there.