Mirror: How can I choose where my Player Prefab will be instantiated?

I am using the AMVCC pattern so this is my scene tree:

Application
- Controller
- Views
    - Camera
    - NetworkManager (Any suggestions where I can put it?)
    - Ground
    -  ...

When I start the host, the player is created at the same level as the Application. It’s possible to instance the player inside the Views? How?

Not 100% sure what you mean, but check out the examples folder in Mirror.
The tanks example already instantiates a player prefab.