I just bought a iphone 6 plus and can't access my email from the phone?

I just bought a iphone 6 plus and can't access my email from the phone?

Make sure you have your email log-in saved onto it, maybe try getting the app for whichever email you use.

How do I do that. I'm technologically challenged when it comes to this kind of stuff. I prefer to use the app that comes with the phone.