Its okay you don't turn gay just because you read one bl (boys love) I'm sorry you were traumatized like that. Don't feel ashamed, you're still the person you were before you read it, nothing's changed.
reading Bl does not make you gay. also, my motto is "no shame no gain, do whatever tf you want" ٩(๑❛ᴗ❛๑)۶
Reading bl does not mean you're gay and you can enjoy it without it having any effect on your own sexuality/gender identity.
That being said there are plenty of good isekais on this site.
Try a list to start:
https://www.mangago.zone/home/mangalist/2397685/
https://www.mangago.zone/home/mangalist/1799075/
https://www.mangago.zone/home/mangalist/2720625/
https://www.mangago.zone/home/mangalist/477611/
You don't have to be gay read bl or gl manhwas you can try out some first tho....
You should try suijin no hanayome
Its a really good isekai
dude... this sounds crazy but I asked a stranger about good isekai that it's good to read when you're bored, but he recommend me to read this uhmm... there this two dudes fu**ing each other and im too stunned what i read lol. I'm straight and I just want to spend my time reading good manga, manwha like that... I feel ashamed to myself now, I'm not gay!! I just met this stranger online