Hey J and welcome to the club...........you know the club of snow and cold so it must winter!
If you have a Clymer's manual they have pretty much show everything you need to know about winterizing your boat. From fogging to fuel stabilizers their are a hundreds to choose from. Drain the water in your engine, fill it back up with anti-freeze. Drain the outdrive, make sure the fluid is not milky brown, fill it back up with new fluid. Change oil and filters, plus water seperators.Put new filters on and fresh oil. Change plugs in the spring. I would try to put your fuel stabilizer in about a week before you do this so it get in the whole system. Fog the engine. I use and have been for many years marvel's mystery oil to fog. Does a great job.
Another helpful hint however many seacocks you have (where the water goes out) use a piece of hanger wire to poke through the opening. There might be sediment in there that would prevent all the water from getting out.Then leave that seacock open and I take the gooseneck housing off (where the thermastat is) and add the antifreeze there until I see it come out the bottom seacock/s. Tighten that up and fill it the engine block up. I use the 50/50 cause it is easier. Most outdrives are self draining.One less thing to worry about.
Use something like a wd-40 and spray the engine and the outdrive. You might would to look at your anodes and prop at this time if they need attention. Remember to store your outdrive in the downward position. It is easier on your bellows.
Well J good luck, I hope I have not confused you with all this. This is very easy but can take a weekend up, so just take your time and do a good job to protect your baby.