$1000 PC gift for my BF

Hi all, I want to build a PC for my boyfriend to give to him on his birthday. He only plays COD on a PS5, so I need it to be better than that. I have seen a few posts saying not to get a PC just to play Call of Duty, but here's the thing: the PS5 is mine, and since I taught him how to play, he basically kidnapped it lol. I need your help with a build that's around $1000 (no more than $1200).

Also, any video recommendations on how to build one would be appreciated. Thanks!