If you want to create a new world at Minecraft PE, there's "New World" and "New Realm". And if you then click on "New World", you can either tap on "Create New World" or on one of the templates listed below. Now my question: Can these be downloaded for free or do you have to pay for them?
The officials of Microsoft cost money. Via divserse (legal) apps you get free maps, but usually not as big as a purchase.