Redragon Wireless Gaming Mouse, Ultra-Light 26K DPI Gaming Mouse Tri-Mode Bluetooth Mouse Ergonomic Natural Grip Build, Full Programmable Buttons, Software Supports DIY Keybinds

I would change literally everything except the case, and maybe the monitor. https://pcpartpicker.com/list/9mYb2k Monitor is OK for the price. You can find better on woot/ebay for open box/refurb but for new it's good. and for mouse and keyboard I would avoid using pcpartpicker https://www.amazon.com/Redragon-Programmable-Hot-Swappable-Anti-Ghosting-Double-Shot/dp/B0CF3VGQFL/ref=sr_1_3?s=electronics&sr=1-3 and https://www.amazon.com/Redragon-Ultra-Light-Bluetooth-Ergonomic-Programmable/dp/B0CX8QN38F/ref=sr_1_3?s=electronics&sr=1-3 are good options, but you can spend more for better if you want other options