You want to take admission in class seven in Navodaya school. But Navodaya does not give new admission in class seven. They give new seat only in class six. If you want to join Navodaya then you must give entrance exam when you are in class five. After you pass exam you can go to class six in Navodaya. Some seats also come in class nine and class eleven. But no fresh seat comes in class seven. That is the rule of Navodaya. You are from Uttar Pradesh so your district will have one Navodaya school. You must keep checking when form comes for class six. Then apply and prepare well. If you already finished class six then wait for class nine lateral entry. You can ask teachers also. Navodaya gives good free education and good hostel life. So try hard and take right step for your future.

https://school.careers360.com/articles/navodaya-jnvst-class-6-admission

https://school.careers360.com/articles/navodaya-exam-date