So you're done with primary... sweet.
If you wanted helos, congrats.
If you didn't, you will soon learn that this is the best thing that could have happened to you.
Check in is a good day/day and a half, of walking around a getting all the things that need to be done, done.
You'll meet with all the important people (CO/XO, Senior Navy/Coastie/Marine, Flight Leaders, etc)
You'll get a tour of the squadron (probably by the senior winger) and get to see your home away from home for the next 6 months.