Intros as in the beginning of each new chapter, (e.g splash intros, or how you start the beginning of each chapter). 
I prefer if they’re short and accomanied with a set bg music making it a kind of like a trademark for the story. It’s a nuisance having to go through long intros every episode 
Best if they’re of few seconds 
Nope, still drafting at the moment. Thanks for the interest though! Let me know when yours is published and I’ll have a read 