If I ask my cousin in Australia if she has a iPhone, should I ask for her Email address?

My cousin Britteny lives in Australia and she has a 19 hour different time zone from us Californians. We text each other through my dads Facebook Messenger. If I ask her for her Email address and if she has a iPhone, do you think it will be a good idea to actually talk to each other? She is a 15 year old girl, and I'm a 14 year old guy.

I don't understand why your age would matter or why you think it would be a bad idea. If you want to keep in touch with your cousin then do so. If not, don't