Minecraft Pocker Edition Realms?

So I want to play on realms on the minecraft pocket edition on my phone but its not on my title screen when I first open the app, and I made a Mojanf account but its still not there, can someine please tell me how to do this step by step

You needed to have been selected by Mojang to be a realms beta tester. Or, if you know anyone who has realms, have them invite you.