If people who have been abroad often asked about their religion and answered that it is Buddhism, what is Buddhism? I hear that they are having trouble replying when asked.
That was probably the case for you too.
It's a great opportunity, so let's learn a little bit about Buddhism.
However, it is not organized into one book of the Bible like Christianity, and it is very broad.
Please listen to the monk's puja at the family temple at your parents' house and read books written by the monk at the bookstore.
If there's anything you don't understand, ask the monk at the family temple or this site.
Basically, Buddhism is the Buddha's teaching.
Speaking of what kind of teaching it is, roughly speaking,
The teaching is to control your own mind, understand the principles of this world as explained by the Buddha, and live comfortably no matter what circumstances you find yourself in.
The denominations have split up a lot, but the purpose is the same.
Be sure to read it.