Inspector is highest u can get into nepal police directly. For that u will have to have a bachelors degree and be under the age of 24 or 25 not sure. U will have to pass physical as well as ur cognitive ability. Dont just think u will make it without a hard labour, its srsly tough, buy a book called inspector capsule or sth similar, u will see how tuff it is. If u pass the physical as well as likhit then u will have to face the interview where money and power talks as they say, but not entirely. I have seen people selected without any of those. Other positions are Assistant Sub Inspector, qualification of inter level required, likhit will be less tougher or constable, 8 class, and here u might be able to take likhit for granted. Same age barrier on all positions.