You can reach out to any local San Antonio rotary club (Alamo Heights, North Central, South San) and they’d be happy to give you more info! The US State Department also has its own study-abroad programs for high schoolers tailored to different career interests. Best of all, many of these programs offer scholarships so you would be able to travel for (almost) free!
Finally, it’s ok to be uncomfortable! One of the things that made me most nervous about travelling was not feeling like I knew everything I needed to know about travelling. How do I order a taxi in another country? What if my flight is delayed? How will I know how to get from the airport to my hotel? What if I’m homesick? The reality of travelling and studying abroad is that you will sometimes not know what to do. Or, you might embarrass yourself by saying something incorrectly in your second (or third or fourth) language. And, you will probably miss the family and friends that know you best! But that’s all part of the experience -- and navigating those situations will only make you more resilient. Once you’re past them, you’ll feel more confident in your own abilities! Plus, the people you meet along the way will not only be happy to help you, but may even become lifelong friends.
