Help to set the resolution

[sebas31500]

Hello,
I will need help to have details regarding the setting of my resolution.
I'm playing the call of duty mw'warzone 2019 game and I'm on a 1920 * 1080 monitor.
I had to lower my resolution to 1360 * 768 because my graphics card does not hold the game.
can you tell me in my case if i should put:
1920 * 1080> 16: 9 stretched
or the resolution of the game
1360 * 768> 16/9 stretched

And for fov type should I put Hdeg 16/9 or Hdeg Res
I want to have the same aim for tracking a target without aiming with the right mouse click (360 distance)

Thank you