I think there are few very important points in proper winter clothing.
1. Shoes. Bring shoes with thick bottoms. Feet are one of the first places that start to go cold on low temperatures. Wear two pairs of socks. I would recommend thin woolen socks!
2. Proper hat. Warm and wind-proof hat warms like nothing else.
3. Jacket that is moderately wind, warmth and water proof. Take a jacket with a hood if possible.
4. Layers is the kay word in Finland too. With a proper jacket I only wear two layers, one tight and one loose.
Two blocks is not bad, I am sure you will be fine.