2003 Mobius gravity games edition

Alright, I owned a 98 Moomba boomerang and i just undone the pic locks and unscrewed the water hose from the engine block and that's what i did every time i took it out of the lake and winterized it, Now since I'm the owner of a new to me 03 mobius LSV 310HP engine, its very different from my other boat, making sure this is all i have to do to winterize this one also, or advise will be appreciated deeply! If I'm in the wrong direction please point me the right way I'm new here.

Also, as I'm new, any cool Vinals i can add to the boat at a cheap price?
Fox decals
Monster Decals
Rockstar Decals
Any cheap tricks to trick out a party boat?
led's
etc?