I honestly don't know if it's a good or bad idea to join NATO when you have a long border to Russia. It's very provocative from the Russian point of view. The biggest problem for Finland is and has always been Russia - that's sad, because it's a well functioning, western, democratic country that's been set as an example and ranked the best country in the world in several rankings. I don't blame ordinary Russians, but the Russian power, that has ruled, threatened and killed my forefathers throughout history. That made my parents' generation fatherless - by physical or emotional death. We haven't totally recovered yet.
https://edition.cnn.com/2022/05/12/europe/finland-leaders-join-nato-intl/index.html