I forgot to welcome you to the board. Pancake, welcome aboard..
We love pictures as someone has probably already said.
With respect to leaving your rig in the drink and tank corrosion, I think salt water will eventually corrode anything. Most tank corrosion I have seen is from lack of proper drainage of water from around the tank. If you have no leaks in the boat the tank should remain relatively dry and that is what you want. If salt water gets to the tank for whatever reason, the ground will help to slow the electrolysis. Also, thru hulls below the water line, like the drain plug, could stand to be grounded which is a real PITA.
I definitely recommend you use at least one sacrificial anode. They are made from some sort of aluminum alloy that is a softer metal, (less noble) than the engine bracket or brass drain plug. Most outboards have one at the bottom of the clamp bracket. The annode will corrode due to electrolysis and give up ions to the other metals instead of the other way around. Replace the annode as necessary or at least once per season. If you do bottom paint don't paint the annodes it renders them useless.