I've already explained this in another post about a month ago but I might as well do it again.
My first exposure to Touhou was Ronald McDonald Insanity, I think this was around 2012-2014 but I'm not sure, I didn't know what U.N. Was her or Touhou was at the time but I still liked it, later on in my life during high school (or after that, I don't remember) when I was dealing with an internet addiction I discovered a couple of YTPMV's and more Ronald McDonald remixes that had Touhou music in it (I.E. NIght of Nights, Native Faith, Deaf to all but the song ETC.) but it wasn't until 2021 that I decided to revisit Ronald McDoanld Insanity again but this time I decided to listen to U.N. Owen Was Her and a couple of other songs and I found myself enjoying them, then I started to look into the series and found out that it has a HUGE amount of games, doujins, music, remixes, fanart and SO much more. At the time I was rather intimidated and I've been thinking to myself "Where the hell do I even start?", I knew about popular fangames like Luna Nights but my laptop at the time had very little storage space, I played a visual novel game called "Save Me Sakuya San!" which admittedly it was a sort of a weird place for me to start but I guess we all have a weird place to start in life, I thought the game was okay I guess but it did bring me some comfort at least, then I decided to look into the characters and the lore and needless to say: I was hooked. I loved learning about characters like Fujiwara No Mokou and the mythological inspiration behind each of the characters and the world of Genskoyo (despite how dark it was), since this year my life has been slowly been improving, I've been able to try out other games like Gensou Skydrift and Luna Nights, I've read some Doujins, I listened to some symphonic metal/synthwave covers of Touhou songs, hell I've even get around to making an account on this forum just to talk about Touhou and I'm glad I did, something about this series just keeps me interested and I don't think I'll be getting out of this rabbit-hole anytime soon but I've accepted that already.
I'm very sorry if this post was long to read, I did get a bit passionate around the middle to the end so I hope this doesn't bother anybody.