I read most religious texts when I was a young teen, cause I was a little nerd who loved to read and had nothing better to do.
The Vedas (Hinduism) were really intriguing. Some of their stories very much sound like a futuristic post-human society, with stuff like nuclear warfare.
A meme comes to my mind. ‘If you need threat of eternal suffering to be a good person, then you are not a good person.’
As mentioned sikhism but also i find occult and exoteric stuffs pretty cool. Even though they are not real, some teachings are systematic and that makes it fun to learn
I’ve always liked the personal empowerment and coupled responsibility of Wiccanism.
Also the driven personal improvement aspect of Buddhism.
Sikhism. I’ve picked it a lot in my playthroughts of Civ6 just because its icon there just looks so cool.