PSAT is offered internationally.
DS rode bus 5 hours to take it in Campinas, Brazil. American School there arranged a home stay for him with a wonderful family. Was NMSQT Finalist. Was definitely worth the time. Taking it internationally will show that you are putting forward some effort.
If nothing else, the PSAT is a free looksee for the SAT. Do poorly and you'll identify weaknesses. Do well, you'll have Merit Scholar in the back pocket, which is good for full tuition at many universities, including for out-of-staters at publics. Don't take it, like Fencer's DS's, and no one will hold it against you.
Best of luck!