Would increasing my monitors refresh rate from 60hz to 144hz improve my gameplay or mechcanics?
Yes. 60hz to 144hz is very noticeable especially when you try 60hz after playing with 144hz. BUT its not magically going to make your gameplay or mechanics betters. It helps and won't limit your potential like 60hz, but don't expect too much. But yes it is worth to upgrade as 144hz is pretty standard nowadays if even lower end hz.