How to Replace Graphics Card in Dell PC?

Recently, I have been experiencing issues with the graphics while using certain photo editing applications on my computer. Specifically, when using the Picsart PC app to edit photos, I have not been able to achieve the high-quality results I desire, nor have I had the best possible graphic experience.

I would greatly appreciate it if you could provide me with guidance on how to replace the graphics card on my Dell PC. Additionally, I would like to know if there are any specific requirements or compatibility issues that I need to consider before making a purchase.