No. Harry Potter is an original work by J.K. Rowling. It has its own unique world - building, characters, and storylines that were created by Rowling herself, not as fanfiction related to Judy Warren.
We can look at the origin. Harry Potter was created by J.K. Rowling, and she has publicly talked about her creative process which has no relation to Judy Warren. So it's clear it's not fanfiction related to her.
I'm not sure exactly. It could refer to something related to children in a cartoonish or caricature style of Core. But it's a bit unclear without more context.
I'm not really sure what 'hijos regalo de dios caricaturas' means. It could be some kind of religious or artistic concept, but without more context, it's hard to say.
The Warrens were real-life paranormal investigators. Ed and Lorraine Warren claimed to have dealt with numerous haunted cases. In 'The Conjuring' movies, which are based on their cases, they faced the Perron family's haunting. The Warrens documented evidence of supposed supernatural activity, like strange noises, apparitions, and objects moving on their own. However, many skeptics question the authenticity of their claims.
Judy is often shown as the one who is more idealistic in fanfic. She dreams big for Zootopia and wants to make it a better place for everyone. Nick is the realist. He helps Judy see the practical side of things. Their dynamic in fanfic is really interesting as they learn from each other. Nick teaches Judy about the underbelly of Zootopia while Judy shows Nick that there is good in the world worth fighting for.
The story of Judy is somewhat based on Judy Garland's life. It captures certain important moments and emotions, but it's not a completely accurate retelling. Some parts are fictionalized to make the story more cinematic and appealing.