welcome aboard
you can do a search of my name and get all my noob ?s and answers. May save time.
i read the forum 3 times a day and will watch out for your ?s.
the other captians answered your current ?s pretty well.
use the radio in the office in port to custom select the items that make up your diffuculty level.
the photo icon is a camera on the periscope task bar. the ship/s you must photo will light it up when locked on in the periscope.
on the main screen is an icon on the right. it has radio messages ,,,,etc. It will tell the status of your missions and if you got a new one, ( they do that)
good luck and i will watch for you.
the sarge