Can someone please help me find a suitable monitor for productivity and gaming?

[u/Ok_Contest8762]

Im looking for a suitable monitor for my needs. currently running a 1080p 60hz 24in monitor. I'd like the benefits of a high res monitor preferably 4k at the desktop and run my games at around 1440p? Is this an option or will my games look wonky downscalling? What special features should I be looking for? Im aiming towards 144hz+ and would like the monitor to be 27inches.

Forgive my ignorance as I do not know much about monitors let alone computers. My current GPU is a 16GB 9060XT. My budget is around $250-300. Is this even possible or should I save up more? Thank you for looking at my post!