Well, fortunately leaving doesn't have to be a permanent thing! Consider it an exciting experience to broaden your horizons, and if you decide your hometown is the place to be then that'll be your right as an adult.

To answer your question: scared, no. Anxious, a little. I'm more anxious about day to day life since that's most of what I focus on. I genuinely can't imagine growing up in one place for 18 years, let alone even being somewhere that long. The longest for me is like 6 or so? And I'm 27! I can't really say I have any magic solution for my anxiety except to never let myself stop trying. Anxiety does get in the way sometimes but today I did my first real outdoor jog (interval style since that's better for me), so that's been a pretty big barrier for me to shatter since I always just did stuff on the treadmill at home. I mean I used to bike a ton but never jog in public. The point is, it's okay to feel scared and anxious, just don't let it stop you from doing anything.