Let me tell you a little about Finland and my time there. In total, I spent 3 days in Helsinki and I have something to say.
On the first day, the city seemed extremely boring and completely unsympathetic. The reason for that was a wrong street and part of the city to walk through and that I was completely exhausted after two flights with a stopover in Warsaw, Poland. Thats why I decided to go with a ferry to Tallinn, Estonia. The trip took about 2 hours and normally costs 20EUR per person.
If you need to get to the city center there are several options. First, you can always take an Uber/Bolt and it will cost you around 40EUR, the ride will take around 20 to 30 minutes. Another option is a public transport. There are express bus shuttle services and direct train to the central station (which is conveniently placed right in the center of the city). You can buy tickets for couple of Euros at the counter or through the app called HSL (actually very nice to use and move around the whole metropolitan area of Helsinki) - 10/10.
Two days later I returned back to Helsinki to see the city from a different perspective. I can say one thing - it was very surprising. Very beautiful streets and gorgeous promenades with lots of musicians and other street artists. Everything is very clean and everyone around is happy and extremely polite. The architecture is reminiscent of imperial Russia, namely St. Petersburg, but unlike the latter in Finland, each building is in perfect condition.