Note: Level 2 is what you always had before version 2.82. Use Shift-L to change levels.
RELAX MODE: Try Level 1 with AutoPilot (Ctrl-P) and AutoSail (Ctrl-S) turned ON, to let your boat be exactly like a robo-boat controlled by the computer ... so you are on board like a lazy passenger... just taking the view and looking around, and is so relaxing! Your boat will avoid other vessels and terrain. You can still take control anytime. And if you get grounded, use Alt-M to move your boat.
But....if you like a challenge use Level 3 and you won't have the luxury of either AutoPilot or AutoSail. You must do everything manual!