If you're looking to improve your gameplay on Call of Duty Mobile, there are a few things you can do. First, make sure you're using the right sensitivity settings. You can find the perfect sensitivity for you by testing out different sensitivities in the game's training mode. Once you've found a sensitivity that feels comfortable for you, stick with it.
Second, practice as much as possible. The more you play, the better you'll become at the game. Try to play against players who are better than you so that you can learn from them and improve your own skills.
Third, pay attention to your surroundings and try to predict where enemies will appear. This will help you get kills more easily and improve your overall kill/death ratio.
Finally, don't be afraid to experiment with different weapons and loadouts. Trying new things is a great way to learn what works best for you and how to best utilize your skills in any given situation.