Hermione would definitely be one of his top allies. With her intelligence and knowledge of the wizarding laws, she could help Harry in making important decisions regarding Ministry policies. Ron would also be there, providing his loyalty and courage in times of trouble.
In the fanfic, Harry might take over the ministry to promote education reform. He could allocate more funds to Hogwarts and other wizarding schools. He may introduce new subjects like advanced Muggle studies to help wizards better understand the non - magical world. Also, he could create scholarship programs for students from underprivileged backgrounds.
If Harry takes over the Ministry in the fanfiction, he could use his experience to better protect the wizarding world. He has faced Voldemort, so he knows the importance of unity. He would probably encourage more cooperation between different wizarding communities. He could also use his popularity to inspire young wizards and witches to be more involved in making the wizarding world a better place, like starting volunteer programs within the Ministry.
His friends like Ron and Hermione would surely support him. They have been through a lot together, and they believe in Harry's leadership. Also, the Weasley family in general would be behind him. They have always been on Harry's side in his battles against the dark forces.
He might meet Hermione. Since Hermione is always interested in academic things like Owls, she could be there to help Harry or just be involved in some research related to it.
Well, in this fanfic, perhaps Harry could face some unexpected challenges during the Owls at the Ministry. Maybe he discovers some new secrets about the Ministry's operations related to the Owls.
It could be a really interesting concept. Maybe in the fanfic, Harry Potter as a character somehow enters Daniel Radcliff's real - life world. He could be confused by all the modern technology and different social norms. Or perhaps he takes over Daniel's acting career in some magical way, causing chaos on movie sets as he tries to adjust to the Muggle way of making movies about his own life.
One way could be to focus on the cultural shock. Harry coming from the wizarding world into Daniel's life would face a huge difference in culture. He could start changing the way movies are made, introducing more magical elements into the sets. For example, instead of using green screens for magic, he could actually make things fly around on set.
In this fanfic, Harry could be suing the Ministry over their education policies. For example, Hogwarts might be facing some unfair regulations that are harming the students' learning experience. Harry, having a strong sense of justice, takes on the Ministry. He might gather support from other students, teachers, and even some of the wizarding families who are also affected by these policies. He would then present his case in a wizarding court, which could be full of all sorts of magical procedures and challenges.
Well, one possibility could be that Harry realizes the Ministry has some good intentions that have been misconstrued. He might ally with them to fight a common enemy, like a new dark wizard threat that is more powerful than Voldemort. Harry could use his influence within the wizarding community to bridge the gap between the Ministry and the people who have lost trust in it.