I found this blog (link below) to be very useful for practising 'Three Point Perspectives' , that is , bird's eye view or worm's eye view.
Learn To Make Three Point Perspectives
Example Nata Questions :
1. Imagine that you are a bird flying over a river bridge . Draw what you see.
2. Imagine that your size has been reduced to 1 feet and you are standing in front of a tall building. Draw what you see.
3. Picture below: Imagine that you are a bird flying over a city . Draw what you can see.