My mom doesn't want me to go to Peru I don't know what to do ( I really want to go )
We really need more information. For instance, how old are you? If you are only a teenager, then you will need to grow into adulthood before tackling your first overseas trip. Once you leave your own country you are on your own, and there is plenty that could go wrong. I have traveled overseas a number of times, an know how easy it is to get lost in a country where English is not widely spoken.
Did you ask her why?