Firstly, thank you so much for the feedback! Glad to have you here :)
So the game will switch between the fixed camera angles and first person perspectives throughout.
To control the character movement in the fixed camera positions, you need to double click (left mouse) on the place you would like to move. Try clicking on the ground instead of buildings or other structures.
First person sections work with normal wasd controls.
Thanks again for your feedback and support! It's my first project on my own so I'm sorry about it being rough around the edges! I hope this helps!
Cheers :)