Magic world journey start with Harry Potter

after dieing in house fire Marvin reincarnated into world of HarryPotter 4.5 years before story and awakened infinite magic system that through out the story will help him achieve highest peak authors note: I decided to use Harry Potter as the first world because it is a good beginning world, magic system and its lore is not that deep secondly: I'm open for suggestions on second world after the third year at hogwarts I hope you will like this story ps: sorry for grammar mistakes English is my secondary language and thank you for reading