I am a writer of fiction
chapters are at least 5 sections each it should at least have 500 words or more. Chapters talk about a specific time or era in the book with a problem and a solution.I would love if anyone drew drawings of  the characters like I describe them but I also find it interesting of you go a little off.
Chapters should be done in a week or 2 if I decide to make it longer. If you want to give me ideas be free too and last I don't like to spoil and I always leave a mystery