You touched on it yourself and a couple of the members brought it up but I think it should be given more emphasis.
Salt Water. It is a totally different animal! I am a fresh water guy but I read this forum a lot and salt and fresh water are two different worlds. You say you know toilets, wait until yours really start to stink from dead sea animals in the water line. I have zincs on my boat that are 8 years old and look like new, until recently I didn't know there were zincs or other anodes in the engine and exhaust system. Bottom paint will be different, fresh water will be rationed, "rinsing" will be needed. The list goes on and on.
And I know nothing about salt water, this is just stuff I have gleamed from the forum. It's not bad, just different. Talk and listen at your new salt water marina.