Hi. Are you starting from Scratch and need to learn how to use an Android phone or tablet? Here are a few getting started links (mostly to YouTube) where you can watch videos about the basics.
FIRST – Basic Buttons, Menus, Tapping, Swiping, Press and Hold
Samsungs Intro Support Page
A Bunch of useful YouTube videos can be found on the YouTube Android Noobz (new users) channel. These will help you know the overall operations of Android devices.