Thank you for your question.
I don't know your denomination, but I think it's a good idea to get the legal name in a place that matches your denomination.
Also, since you are still young, I don't think you need to get a legal name in a hurry. (It's good to have it when you're young, though.)
It's fine even after you become an adult in the future. You don't have to overdo it with your parents and get a legal name. Parents might be worried too.
That's because it would be nice if the Buddha was cherished as before, regardless of the name of the Dharma.
The coronavirus is also spreading now, so it's a difficult time, but please be sure to prevent infection.
That's because the Buddha also taught me to calm down about everything, think carefully, and act accurately.