Game for beginners

Hello, I need to create a simple project in Unity, it doesn't have to be perfect at all, just so that you can run back and forth, I have three keys that I made in Blender, description - 

The player finds themselves in a complex maze full of traps and enemies. The player's goal is to find and collect three keys that unlock the gates to the next parts of the maze. After collecting all the keys, the final gate opens, which completes the game.

Theme:

Of your own choice (for example, space, horror, action, medieval).

1. First-person camera 
2. Lives — The player has a certain number of lives. Contacts with traps or enemies reduce the number of lives.
3. Keys — The player must search for and collect keys in the maze.
4. Character — The main character controlled by the player.
5. Enemies — Dynamic characters or entities that threaten the player and take away their lives.
6. Traps — Various static obstacles or mechanisms that can take lives or complicate movement through the maze.
7. Gates — At least four gates (three for each key and one final).
8. Maze — A complex environment that the player must explore to find all the keys.
9. UI (user interface) — Displays the number of collected keys, time, current number of lives, and other important information for the player.
10. Responsive control system — The player should be able to smoothly control their character, jump, run, dodge obstacles, and interact with objects in the game.
    
    This is all ideally, the main thing is to be able to run somewhere in the maze, and there should be doors that open with my keys from Blender that you pick up along the way.
    I have a template where there is a cylinder with a camera attached and an animation of a key spinning in place, although you probably don't need this 
    I was given this task at university, but I have no desire or time to engage in game development