From the pedestrian's perspective, Finns are very courteous drivers. The pedestrians do their part by following the traffic signals, where present; you'll see very little against-the-light jaywalking even if the nearest vehicle is over a block away. At marked crosswalks with no traffic signals (of which there are a lot even in Helsinki), drivers stop for folks who look as if they might just possibly want to cross the street, maybe. They do not wait to stop until the pedestrian is actually off the curb and into the crosswalk. You probably will need to do that, too, lest you sideswipe locals who expect to be able to step off the curb with impunity.
I thought car traffic generally seemed quite light, but on the other hand, there are plenty of bicycles and electric scooters to contend with. The riders are not discourteous, but they are fast and confident, so they can seem to materialize out of nowhere.