I know i need to wear leather, tall boots, helmet.
You savage, you...
Actually you don't "need" all that stuff, and you can build an impressive all-weather riding wardrobe pretty reasonably if you shop online at places like Leatherup (no, I'm not affiliated, but I have spent a fair amount of money with them...at discounts of course
) Motorcycle Superstore, Jafrum, etc. Look for bargains and Leatherup always
has at least 10% discounts and often free shipping, no sales tax.
If you like leather, that's cool. Over the years I've transitioned to textiles with armor and mesh with armor. You can find waterproof/windproof textile jackets in the $70 range, and I have a pair of reinforced pullover water/windproof pants that have served me well for the last 5 years; cost about $30. Shop carefully.
As to saddlebags, your style preference and some prudent measurements taken from your bike will tell the tale. The online vendors that I've mentioned have a wide variety of economical saddlebags in many styles. Naturally if you set your heart on Corbin or equivalent, $200 won't get them to even answer the phone
Due diligence, look at other bikes, measure what your bike can accommodate, and then make haste slowly.
My only reservation about your sled helmet might have to do with aerodynamics. You might be a real snow hot-dogger, but bucking a 20 mph headwind at 60 mph on a bike means the helmet has to be stable through slipstreams that will sometimes exceed 100mph (not a consideration for blue bike owners