Hello and welcome here!
First off your Orochimaru cosplay is pretty cool! And I hope you enjoy your time here and get some new friends. I was also glad when I found out you where learning Finnish.
Before you ask, I´m Finnish but I live in Sweden and I speak both languages fluently. I must sadly say that the most Finnish cosplayers here don´t visit this site so often, so this section is inactive. The site aniki.fi
(click on the purple logo to get to the discussion forum) is where many Finnish cosplayers discuss cosplay (and anime/manga) in general. They also plan cosplay meets there for coming conventions.
If you live in Finland and enjoy to cosplay you should definitely visit cons in Finland! They are great!
Good luck with the language and the future cosplays!