How can you be a canadian and just now picking up skiing?
Rule of thumb: you get what you pay for
When it comes to jacket and pants you want something waterproof and fairly thick. Still layer clothing underneath.
I typically wear an underarmor tight shirt, a t-shirt, and a thin, light hoodie. I have compression short-style underwear and that's warm enough for me, but some people wear more.
The cold will burn your face so invest in a balaclava or some sort of face covering; try for a loose one that you can tuck your nose in if its sensitive to the cold (this will go away with time).
Goggles are up to you; you can spend a couple hundred and get premium goggles (I've got Oakley Prizms) or thirty bucks on a simple pair.
I wish I could tell you boots were easy, but you need to try them on and see how they feel on your feet. They should be snug but not bending your toe when you lean forward. If they're too narrow or too wide you can lose control if a ski pops up.
Your first set of skis should be thin, this will give you better turning and a little more control. They are also primarily for corduroy snow and not powder or clumpy mashed potatoes. When you get better with your skis and you want to upgrade, wider skis will handle shitty snow and power very well, but they are heavy and harder to turn.
Pole height for me is at the belly ( I use smaller poles ) but some people get them at the ribs. The poles will primarily used for balance and dragging on the snow but don't use them as a crutch if you lose control on the slopes; more body, less pole in that case.
Go slow, don't go straight down the mountain. Learn to go back and forth and pizza as a last resort. Turning is done with your ankles and knees.
Confidence is the biggest thing in skiing. If you aren't confident, you'll ride the mountain on your butt. Don't be cocky, though, and overextend to harder runs. Diamonds are for when you can tear up a hard blue.