What is your particular power supply?
Your PC is showing its age, so I recommend purchasing a new one, as it isn't really worth upgrading your current PC in my opinion.
If you're going to build one yourself, I can help you select the best parts within your budget.
If going pre-built/custom, I'll configure a custom build via CyberPowerPC.
If you must upgrade your PC, the only thing that can really be upgraded is your graphics card; however, I still need to know your power supply.
MSI Radeon RX 5500 XT:
https://www.newegg.com/msi-radeon-rx-5500-xt-rx-5500-xt-mech-8g-oc/p/N82E16814137488
Asus GTX 1660 Super:
https://www.newegg.com/asus-geforce-gtx-1660-super-ph-gtx1660s-o6g/p/N82E16814126353?&quicklink=true
I personally recommend that you get yourself a new PC if possible; I can configure you a custom link via CyberPowerPC or select the best parts within your budget via PCPartPicker (if building one yourself).