So the best way to do it is: first, find an apartment and sign the contract second, go to the police station and get the permit (Do i get it right away?) third, permit get and all good? Is that it?
1. Find apartment, sign contract
2. Just report at the nearest police station and register your new address there.
3. Get permit, its a long haul process. (not from police station, it will be issued from PSB office, your school will help you with that)
4. Once you get the permit, report at the police station again