Journey to Hogwarts

This is my first time writing a book, so there are definitely a lot of bad things, please forgive me. Please be merciful. The main elements are Hogwarts and elements from other dimensions to be determined. I don't know what to write about. There will basically be no harem or anything like that, but the protagonist is neither a monk nor a virgin. I will make the protagonist more realistic, but there will definitely be many details that are not well written. Please forgive me. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.