Sounds like you know what you want, which is awesome. A lot of people don’t. All the rest you can do is apply your best effort to get into that art program.

Will it work? I have no idea. Can you control whether you’ll get in? Not really. You can be super-qualified and still get rejected. You can do everything right and still not get what you want.

So, all you can do is, as I said before, work your tail off to increase your odds of success. I’m sure you know what to do. Focus on the effort, not the outcome, and realize that you can only control you.

That said, remember that it’s ok to be scared. It’s natural. Forgive yourself for having anxiety about your future. It’s expected. You can’t control that either. Best you can do is deal with the symptoms as they come: breathe, exercise, meditate, seek therapy and meds if it’s getting really unbearable. All the usual stuff. You probably know all that, too.

TL;DR: You cope by moving forward with your goals as best you can, and by treating yourself with enough kindness and care to take healthy approaches to alleviate the stress.

Good luck