In the current state, the easiest solution is to find the End Portal on the tutorial map. Coordinates are:X: 176, X: 30, Z: 109
After that you just only need 12 Eyes of Ender to open the portal. Use the diamond blocks to craft yourself a full set of diamond armor and a diamon sword and you are ready to go.
Yes, it is a PS4 tutorial, but it is working on Xbox One too. Makes easier to find the portal.