This is a review from my experience upon playing this about 13 minutes ago on my ipad. (And no, its not on android yet, but it is on Apple.) Now that it has released on Apple, I just got done installing it.  Once it's done installing, it will have you enter your alias/nickname. The tutorial will have you choose between 3 different warframe characters to start with. (Make sure you read about the abilities of the character that you choose, because after you choose your character, you will have to farm some resources from a several planets to unlock the blueprints/schematics for a different character once you've maxed out your 1st character. You can also just buy them from the store with real money as well. [Yes, there are a lot of different warframes.] 

but who the hell will pay $250 smh