His daily routine would be completely different. In Hogwarts, he has to follow the school schedule which includes things like Potions class in the dungeons and flying lessons on the Quidditch pitch. At a Muggle school, he'd have normal subjects like English, Math, and History. And instead of having a Great Hall with floating candles for meals, he'd be eating in a cafeteria or bringing a packed lunch.
Socially, it would be a big change. In the wizarding world, he has friends who understand the magic and the unique challenges that come with it. At a Muggle school, he'd have to make new friends and keep his wizarding identity a secret. He might struggle to find common ground with his Muggle peers at first, but over time, he could learn a lot from them and vice versa.
His life would be very different. He'd probably have to deal with different expectations. People might expect him to be more gentle and less adventurous at first. He might also have to change his fighting style if he gets into any dangerous situations, as a girl he may not be as physically strong in the eyes of others. And his relationships with his friends would shift. Hermione could become a closer confidante, sharing more 'girl - talk' type of things with him.
His relationships would be more turbulent. With Ron, they might have more arguments because Harry's temper could cause him to overreact to small things. In his romantic relationships, if he has any, his temper could be a turn - off or a source of conflict. For example, if he's dating Ginny, his outbursts could lead to fights that they'd have to work hard to resolve.
Harry could take the girl to his favorite spots in the wizarding world, like Hogsmeade. He would have to be careful not to expose too much magic at once. They would interact with each other through sharing their different cultures, Harry's magical one and the girl's Muggle one.
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.
Harry's magic could actually give him an edge in some ways. He might be able to use his quick reflexes from Quidditch in gym class. And his knowledge of potions could make him really good at chemistry, even if he had to pretend he was just really interested in normal chemical reactions. But it would also be a source of stress, always having to hide it.
The recipes in Harry Potter's bakery would be based on wizarding traditions and tastes. There would be a lot of things flavored with magical plants and potions ingredients. For instance, there could be cakes made with dittany for a healing effect or cookies with a bit of Felix Felicis in them to bring good luck to those who eat them. The staff might include house - elves or wizards with magical cooking skills. They could use magic wands to stir the batter or decorate the cakes in a way that's impossible in a Muggle bakery. Also, the bakery could have a magical climate control system that keeps the pastries at the perfect temperature and humidity without the need for normal heating or cooling devices.
He'd be more in touch with nature. His magic could be centered around life - based spells.
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 would be much quieter. No more noisy Gryffindor common room or bustling Diagon Alley. He could enjoy the peace of nature, listening to the wind in the trees and the calls of magical birds.
His life would be very different. For one, he'd have to deal with the extreme cold. Magic would be used in different ways, like creating warm shelters or finding food in the harsh winter. Also, he'd be far from his friends in Hogwarts, so he'd have to make new friends, maybe among the local magical folk or other outcasts who live in Alaska.