Preferences: 1. Based in Naruto universe 2. 100+ chapters 3. Non-canon protagonist 4. None of the following: The Strongest Hokage, Hokage: Ryo’s Path (Oml! It's OBITO!!)
I think I heard someone saying 'Strongest Naruto System' is a good fanfiction, so check it out if you want edit: Sorry it isn't 100+ translated chapters yet so forget about it (my mistake )
Good choice, but still I'd prefer a non-canon protagonist Tbh, the main reason I'm biased is that he becomes Naruto...
OC can be used to search in the filters in fanfiction.net, most SI stories will have OC as a filter and SI in the description. if you are wondering OC means Original character and SI is Self Insert
I would recommend using fanfiction.net or Archiveofourown.org. with the numerous filters there you can find what you need, be they 100 chapters of drabble less than 1,000 words, or chapters that have a word count of 10k+. A good filter on ao3 is 'word count' which give the fictions with the longest word count first. While Naruto-centered fics may be prominent there is a lot that are not centered on him.
Your taste is shit, but thinking on the bright side, any Naruto fic from my list is gonna blow your mind https://www.fanfiction.net/~zhawarudo Hope you stay away from trash CN fics afterwards.
With fanfic everyone starts with reading garbage and become pickier as they read better and better stuff. Let him enjoy the trash while he can.
Webnovels too, but at least when we started reading fanfics there was no CN crap so our souls are saved.