new computer gaming computer

Hey y'all! I got this desktop for 20 bucks want to upgrade it for gaming I'm on unfamiliar on how and what's compatible I'm willing to learn and buy the parts just need to be pointed in the right direction. It's a Lenovo 510a-15Icb desktop with Intel core i3 processor with 8GB ram. I usually...

If I reach minimum requirements of a game in what settings should I play that game What about the games optimized greatly