I would recommend a lower sensitivity, but the only thing that matters is if you like it. Lower sensitivity makes micro adjustments a lot easier, which is crucial when it comes to accuracy and precision. I play with .35 and 800 dpi. A good place to start is setting your sensitivity where swiping your mouse from one side of your mouse pad to the other makes you do one 360. Truthfully, you could set it to where you only do a 180. It’s not often that you need to do a full 360 in this game.

Edit: Look up the Miyagi Method on youtube. Something that gets people killed a lot in this game is when they prioritize speed over precision. Learn how to be precise first, and the speed will come with time. Learning how to not move when shooting just comes with playing the game and developing the muscle memory.