Making game start with a menu

I am making a game in unity that I want to start with a little menu that the player can use the cursor to navigate and click on certain options. However, when I play the game, it immediately puts me in firstr person mode of the camera where my mouse makes the camera turn. How would i change this?

u Should set number 0 to First UI Scene and Number 1 to Character Scene in this way : File → Build Setting —> Scenes In Build

Create a new scene then make the menu that you want in that scene and when player clicked the play button(for example) change the scene to your desire.