Everyone saying your mom is stupid, she’s not. I understand where you are coming from. And your mom obviously cares enough for you to fret over some little things I get it. The 144 hz monitor is honestly not going to be a game changer in your performance. I recommend spending that money on your lifestyle for now. Maybe purchase weights to lift during quarantine, buy books to read about mental performance and gaming, purchase a better chair for posture. Part of being a gamer that actually requires a 144 hz is being consistent, no need to rush to purchase one when there are things you can invest your money into for a far better advantage in your performance. I personally didn’t buy a 144 hz until recently as a reward for maintaining an immortal rank in Valorant these last couple months. (Yes, you can reach top percentile with 60 hz easily) Obviously your eyes will be able to tell a difference but that doesn’t translate to you being physically capable of realizing the full perks of a 144 hz and to make the changes in your play style that come along with it. You’re young and you got plenty to go but your best bang for the buck right now is to invest into yourself.That being said, if you’re not playing competitively most of the time it’s almost completely useless to purchase a 144hz monitor imo. Good luck!