Mate, fellow stutterer here. First of all DO NOT GIVE UP ON YOUR DREAM! I have a stutter and I’ve actually stuttered in front of a High Court judge! Crazy right? It’s just your first attempt, you’ll only get better. If speaking in front of crowds is the problem, try and gather some friends and family and speak in front of them. Slowly but surely you’ll see the change. Don’t worry, you’ll get through this and you’ll get your dream job and be a flight attendant one day.