Inspired by World of Cultivation looking for mc with a few screws loose, NOT in a psychopathic way but mc is just uncomfortable with social interactions and doesn't think much outside of cultivation / grinding / "insert main theme of novel" Edit: savant like MC is also acceptable if he is autistic Similar Read: Everybody loves large chests Swordmeister of Rome To Be a Power in the Shadows Sovereign of Judgement
The Silly Alchemist Against the Gods Everybody loves large chests Super minion Invisible Dragon Gourmet of Another World Goblin Slayer Pure Love x Insult Complex Korean pornhuas. They're all pretty autistic in their own, unique ways.
not a Webnovel "The Curious Incident of the Dog in the Night-Time"(Mark Haddon) tbh its not that good and even annoying, but it does fit what you asked for.
Against the Gods? -_- How is Yun Che autistic? He is lecher in early chapters, gets edgy in the later chaps.
Hm if you really want an Autistic MC, the ML in https://www.novelupdates.com/series/my-husband-with-scholar-syndrome/ has Savant Syndrome. Not the best, but nevertheless a well-written character. It is a josei SoL tho In movies, I'd reccomend Rain Man