build it urself, no prebuilt shit, only real advice i can give u, saves u a lot of money and u can get better specs with less bottlenecks, speaking from experience it's easy as fuck
AMD GOOD GOOD. Buy Ryzen 3600 with something like GeForce GTX1660 (TI) and 3200 16gb ram. if u in america its very cheap otherwise its still a bang for the buck
https://pcpartpicker.com/list/TtwQ3b creepis has prob something better but this is actually Close to my build. If u want u can get cheaper case and Power supply if you really need the 800 dollar budget or you could cut some Money here and there to get better Graphics. this for cheaper https://pcpartpicker.com/list/YW2CpG. Either way alot room for upgradability.
did the bios Flashback. easy but you have to follow the instructions very carefully. pain in the ass if u dont :/. imo stock cooler is really good. missing out on 0.1 GHz for overclocking capability otherwise no problem.
3600 comes with the Wraith Stealth which is really bad but capable enough, I swapped my friends Stealth with my old Spire that I don't need anymore and it's even better because the Stealth is a bit loud (atleast his). I included the Arctic as I had the 33 myself, 34 is improved I think? It got really good cooling performance for PBO/AutoOC and doesn't break bank.