Help. I may need new things..

So I have a shitty keyboard,monitor, and quite possibly a mouse. My keyboard is the Amazon basic keyboard. My monitor is an Acer 24" K242HL monitor. And my mouse is a dragon centrophorus. I was wondering if there are any options that would improve my gameplay. I have a 980ti and a 5620k if that helps. I am not looking for a 4k monitor because that shit is too expensive. Thanks