First time travel nursing start in a week what to expect

Hi I was trying to find threads on the website that give insight to travel nursing. Now I am kind of surprised this agency took me on, but I have a little over a year experience in Med/surge with no tele experience. I also have rehab and sub-acute experience. Kind of nervous to start and I don't know what to expect. I'm leaving my children and husband behind for the duration of time during this contract work. Although this contract work is in the same state as where I reside (Cali). My plans are to work the 3 days (12 hr shifts) and then come home on the days that I have off. How is the scheduling like for most travelers and last but not least they are only giving me 4 hours of orientation and that is it. I just want others insight and some good advice to ease my nerves, just don't want to do anything to screw my license over with lack of orientation.