Oooh, nice! I stayed there for a month and a half a while ago, I've seen most parts of it. In a better season though 😅 Lauttasaari is probably my favorite part, the whole seaside park area along the south/south-west side, I've spent many evenings there :) 🌅

You can also go through a chain of islands from Ruoholahti via Lauttasaari and north from there and come out in the north of the city, on a bike, but probably too cold for that now… The park on the south-east edge of the city (Kaivopuisto) is pretty nice too. And the Töölönlahti neighborhood too.

I liked Suomenlinna, but I don't know if that's open now. And I've eaten some good things at the Elite restaurant at Hesperiankatu (it looks very fancy at first sight, but I didn't feel bad there dressed not-fancy ;). Lohikeitto is always worth trying, not only there (it's not hard to find) 🐟