I haven’t trie it but google said this.
To play inZOI in first-person, enter Manual Walking Mode (WASD) and press the Tab key. This switches your camera into an immersive, over-the-shoulder view. You can fine-tune your camera angle by pressing X along with the Arrow Keys [ ← / → ]. [1, 2]
Note: There is no true, unobstructed first-person camera that lets you see your own character’s hands or body in the base game yet. However, using an umbrella triggers a locked POV close-up that closely mimics a first-person perspective. [1, 2]
also here is the page link