Can a foreign countries enroll or get a training in FBI Academy? If so, what are the requirements?

If you're on law enforcement you can be trained at the FBI Academy

Yes, the FBI has an International LE Program; contact the US Embassy in your country and ask to be connected to the FBI Legal Attache, if there isn't one there they should be able to get you to someone who can help.

Go to their website for the contact info.

hi to you my name is Ameth I'm 19 years old my dream is to become a fbi agents but I do not know the conditions

FBI.gov has an the information

Yes, they can. But i don't know what are the requirments.