I want to be a professional bowler

Although I do not have any experience in this area, I would like to share some general advice on this topic.

It's a wonderful thing to have a dream and to go after your dream. In life, it's best to have your Plan A in your scope, and also to have a Plan B in mind as well so you have something to fall back on. Whenever you are pursuing a dream that requires you to have specific physical attributes, such as being a professional athlete, you must also consider that an injury or accident could cause your dream to be hindered or delayed. Your Plan B could involve coaching in the sport, or having your own business relating to the sport, or could be some other interest entirely which involves a professional career in some other field. Best of luck to you with the pursuit of your goal!

Keep training and find a good coach to support you, and the most important  believe yourself.