There’s lots of resources out there for people, especially teenagers, who stutter. The NSA (national stuttering association) website has links for specific areas. Therapy and finding other people who stutter have helped me tremendously. It absolutely does get better with time. Also, even normal therapy could help with your anxiety if that’s an option for you. <3 And definitely go for the interview. If you’re stuttering badly just mention that you have a stutter and everyone including you will be much more comfortable.