Character addressing audience in my script?

So I want to open the my film where the main character is sitting at a bar and talking to the audience. It would probably open with actually looking into the camera and actually addressing them with the dialogue. I won't do this again in the script and it makes sense because it will have narration, I just feel like this would be the best way to begin after rewriting my first scene multiple times. I was wondering how you write this into the screenplay, is there a special way to show the character is addressing the audience the same way you can write V.O for voice over or O.S for off screen. Plus what do you all think of this technique? Is it against normal rules of screenwriting to this or is it perfectly fine if done right?


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