While I am not nor never have been Navy I think I can help you. ODS(Officer Development School), OCS (officer candidate school), and also OIS (officer indoctrination school). OCS is a school that officers would take that are in certain branches, basically combat type jobs. Support officers (like nurses and many other branches) would go to ODS. ODS isnt as rigorous as OCS, and it also has alot of different types of courses. Where certain things that are important for most of the combat arms branches, they arent really important for the support branches. OIS which doctors, lawyers, and chaplains and the like is all more easier. It is basically fork and knife. I think it is around 2 weeks and they learn how to wear the uniform, and learn some military leadership stuff.
so basically OCS=hardcore, ODS=tough but not as tough as OCS, and OIS really not much going on here lol.
IF your ODS works anything like the Armys BOLC, you will not PCS to your ODS. You will recieve orders for your first duty station before going to ODS. the orders you receive actually for ODS will have your first duty station listed on them. As well as what date you are due to show up.After ODS you will head to your first duty station, where you will be given time, usually around 2 weeks, to find a place to live. You will be given BAH also if you are living off post. You will also be given BAH temporarily, in the case that you want to live on post but nothing is available and you are just waiting for a place. Once you get your orders, for ODS and your first duty station, you can contact that first duty station and talk with the travel department, and housing, to get an appointment for them to come pack up your things, and move it to a storage facility, in which they will wait on you to get your place at your first duty station and call them and they will drop it off there. OR you could do a dity move, get a uhaul and move it all yourself and the military will reimburse you. most of the time you will get more than you paid. Sounds confusing I know but if you google DITY moves it is better explained.