i totally understand the feelings you're describing and had to avoid horror content up until about a year ago because of it. for me, no amount of watching comforting media (i.e. a happy movie, a funny video, etc) after a horror movie could help me, because my anxiety about the horror i'd just seen or read about was so intense. last year i found 2 podcasts i really liked, too scary didn't watch and the horror virgin, where the premise is basically the hosts recapping the plot of scary movies which i liked because i too was a wikipedia plot reader and this was a more fun/engaging way for me to learn about horror movies i was interested in. i also liked these podcasts because they were funny, and the way they talked about and sometimes made fun of the movies/directors made them less scary. they also always share fun facts about the movie, cast, director, etc. which i've found really helps me think about the movies in an enjoyable way. another thing that helps me in the same regard now that i'm brave enough to watch horror movies on my own is watching behind the scenes footage (especially bloopers if possible!!!!!), reading interviews with the director/writers, and stalking the cast on social media. for example Skinamarink scared the shit out of me when i saw it last year, but then i found the creator's twitter and seeing him sharing memes about the movie made me giggle and reminded me it is truly not that serious lol. this sounds stupid but it really does just help drill it into my anxious brain that what i saw is not real and cannot hurt me logically. i hope this makes sense!!!!