TIPS
If you would like to play tennis in the summer (or winter indoor) you can search locally for a tennis partner in Facebook in the group Tennis Activity Group Finland. There was no help before this group was created to find locally a tennis partner. It is totally free. In English.
Also, if you like cycling, and would like to ride together with others, meet new people and make new friends by cycling together without sweat then you can checkout the parallel group Cycling Activity Group Finland. They arrange NO fastpaced sport cycling but social enjoyment; meetups with bikes, music, cafe, sightseeing etc. Although this is NOT sport group, any form of cycling is a health boost and can be called 'sport'. For example last summer they had arranged trip to Lovisa where they rode sightseeing, cafes, history etc. In English and also possiblity to learn Finnish-Swedish.
Welcome!