An interest like anime is probably like the farthest thing you need to worry about when deciding if your interests are a turn off.
I’m a 19 year old female college student, trust me when I say there’s more people who like anime than you realize. It’s starting to become “cool” now (which is funny as people like me who have liked it for a while would get made fun of it back in middle school but I digress), especially with the mainstream and rise in popularity of anime’s like AOT, Demon Slayer, and JJK. I’ve met a good 80% of my friends in college because I saw a Naruto sticker on their laptop and started a conversation with them about it and things like that. Even people who I thought were “too cool” for anime liked something, usually AOT or One Piece.
Sure, not everyone likes anime and there are definitely people out there who think it’s weird still, but with the rising generation, especially gen Z, it’s a super common thing to talk about anime. Ofc, I don’t know how old you are, so the stigma about anime and nerdy topics are definitely different from generation to generation. But there’s always people out there who share your interests, especially girls. I wear my attack on titan t-shirt to volleyball and guys come up to me and talk about it all the time. You’ve just got to find your people. Sad truth is a lot of women are shamed for liking stuff like that while guys get away with it because it’s more acceptable for them, so a lot of girls hide their interests in nerdy things because it’s “weird”. Just be confident about what you like and people will find you. One negative experience does not equate to every experience!