His daily routine would be completely different. Instead of going to classes like Potions and Transfiguration, he'd be in Math and History classes. He might feel bored at times because he's used to the more exciting and magical learning at Hogwarts.
His relationships would change a great deal. At Muggle school, he'd meet different kinds of people. He couldn't talk about Quidditch or the wizarding world freely. So he'd have to find new common interests with his Muggle peers. And he might have to deal with bullies in a different way than he did at Hogwarts, without using magic.
When Harry Potter goes to Muggle school in fanfiction, his view of the world expands in a new way. He starts to see the Muggle way of life more closely. He might learn to appreciate things like Muggle technology, which is so different from magic. Also, he could bring some of the values he learned in the wizarding world, like loyalty and courage, to his new Muggle school environment, and in turn, be influenced by the Muggles around him.
He might struggle to adapt at first. In a muggle school, there are no magic classes or flying broomsticks. Harry would have to deal with normal academic subjects like maths and history. He'd also have to hide his magical abilities, which could be really hard when he's used to using magic for so many things in Hogwarts.
Well, he'd probably be a bit of an outcast. I mean, he has all this knowledge of the wizarding world and magic. At Muggle school, that doesn't really count for much. He'd have to hide his identity as a wizard too. And think about the subjects - no Potions or Defense Against the Dark Arts. Instead, it's all Math, Science, and English. It would be a huge adjustment for him.
He might become more reserved. Without the constant use of magic and the wizarding world around him, he could be less confident. For example, he wouldn't be able to use magic to solve problems quickly, so he'd have to rely on his wits and Muggle knowledge more, which could make him a bit more cautious.
His life could change drastically. He might start to see the magical world in a different light earlier than in the original. For example, he could meet some early allies or enemies right after getting the letter.
When Harry Potter becomes part phoenix in fanfiction, his relationship with the magical world around him would shift. He could communicate with other phoenixes in a way normal wizards can't. This would give him access to knowledge and secrets that are hidden from others. Also, his role in the wizarding community would become more special. People would look at him not just as the boy who lived, but as a unique being with the powers of a phoenix. He might be seen as a symbol of hope and renewal, much like the phoenix itself.
In fanfiction, if Harry Potter goes to Muggle high school, it could be a chance for him to grow in a different way. He'd have to rely on his non - magical skills. Maybe he'd make some really good Muggle friends who would accept him for who he is. He could introduce them to some of the less dangerous aspects of the wizarding world, like Bertie Bott's Every Flavor Beans. It would be a whole new adventure for him, away from the usual wizarding threats.
When Harry moves to America in fanfic, his social life is completely transformed. He is introduced to a whole new set of magical families and individuals. His status as 'the boy who lived' might not carry the same weight, or it could be even more of a novelty. He might have to learn new spells that are more common in America. His daily routine would be different, from the food he eats to the way he travels around the magical areas. And his view of the wizarding world would expand as he discovers the unique aspects of the American magical society.
In an Irish - set Hogwarts in the fanfiction, the social environment would be different. There could be more Irish - themed celebrations and traditions that Harry participates in. Irish folklore might be more integrated into the school curriculum and daily life. Also, the relationships between students might be influenced by Irish cultural values such as a strong sense of community and family. Harry would have to adapt to these new social norms, which would significantly change his overall Hogwarts experience.
She could make him more aware of the Muggle world. Harry has grown up mostly in the wizarding world, and having a Muggle girlfriend would expose him to different ways of thinking, like Muggle technology and their social customs.
His relationship with magic could also transform. Without the support of the wizarding community, he may start to explore magic in his own way. He could discover new spells or magical abilities that are not taught at Hogwarts. This newfound knowledge might be a double - edged sword. On one hand, it could help him survive as an outcast. On the other hand, it could further isolate him as it makes him even more different from the others.