Naruto would face the challenge of self - discovery. Being forced into the ninja life, he has to figure out if he can actually find something positive in it. He also has to face the danger that comes with being a ninja. With his initial reluctance, he may not be as prepared as those who willingly entered this path. And there are the political aspects within the ninja world that he'll have to navigate, which can be especially difficult when he didn't choose to be part of it.
He has trouble moving around. Without sight, he can't easily navigate the village or the forest. He might constantly bump into things. Also, in combat, he can't see his opponents' attacks coming. It's a huge disadvantage compared to when he could see.
Well, Naruto is a complex character. Initially, he may feel a sense of confusion. He might wonder why he is being forced when he has his own ideas about what he wants to do. He could also feel a bit of fear, not really knowing what being a ninja fully entails. He might be worried about whether he can meet the expectations that come with this forced role.
One challenge could be the lack of stealth in his initial attempts. Naruto is used to being more in - your - face as a ninja. As a sniper, he needs to be more covert.
Naruto will face numerous challenges. Politically, he has to navigate through the complex web of power - hungry nobles and bureaucrats who may not like an outsider, in a sense, becoming the heir. He'll have to learn about governance and diplomacy quickly. Socially, he has to deal with the different classes of people in the Fire Country, from the poor peasants to the rich merchants. And as a ninja, he still has to protect the village from threats while being in this new role.
He might face internal conflict. Naruto has always been an open and honest person, so keeping such a big secret could go against his nature. This could lead to him struggling with his conscience. Also, he would need to balance his normal life with his secret Hokage duties without raising suspicion. For instance, he can't always disappear suddenly to attend to Hokage business without people getting curious.
Naruto would face the challenge of loyalty. He has deep - rooted loyalty to Konoha, and now he has to transfer that loyalty to the Mist Village. This mental shift would be tough. He'd also face challenges in terms of training. The Mist Ninja training is different in terms of intensity and focus. He'd have to learn how to be more stealthy and less obvious in his actions, which is quite the opposite of his usual style. And he'd have to deal with the possibility of being used by the Mist Village for their own purposes against his will.
The main challenges for Naruto could be related to his past. He has a difficult past with being an orphan and having the nine - tailed fox inside him. In this fanfiction, he might have to come to terms with his past in a new way. He also may face enemies who target him because of his unique situation, and he has to overcome these threats while still holding onto his values and becoming a true ninja.
One challenge Naruto might face is the intense study required. Medical ninjutsu involves a lot of knowledge about the human body, herbs, and chakra control in a healing context. Naruto isn't exactly known for his patience with studying at first. Another could be the emotional toll. He'd have to deal with seeing severely injured comrades and might struggle to keep his emotions in check while treating them. Also, some might not take him seriously as a medical ninja since he's been more of a combat - focused ninja for so long.
Enemies might target him more. With such great strength, he would be seen as a huge threat. Other ninja villages or evil organizations might try to eliminate him or steal his power. He would have to constantly be on guard and develop new strategies to defend himself.
One big challenge would be the social pressure. Naruto would be constantly in the spotlight as the only male. Every female would have an opinion about him. Another challenge would be in combat training. If the training methods are designed for females, he might have to adapt to different physical standards. Also, finding true allies would be tough. Some might see him as a novelty or a tool to gain power.