Good luck with the training and get better as soon as possible!
About the language course:
I am sure that you will be successful with English, because people say that "Finns speak English very well".
Even the Finns themselves are saying this.
One of them mentioned the "toinen kotimainen" ("the second native language" or "the other domestic language") joke and saying "Except it's one of those jokes where 100% of it is true, and it just lacks the official documentation and status."