So what kind of low level job you are thinking?
You can't @#$% flip burgers without FINNISH, or did you presume that person hiring will not think of the mess that takes place when language for communication between front and kitchen has to be changed?
Or did you want to come to counter? Well, tough news OP, I am NOT changing language for some foreigner if I am in Finland and require service. Either you learn language, find someone who knows language or I change place where I do my business.
In short, only jobs where you can get job without Finnish and without any special education are pretty much cleaning jobs. And want to guess how many OTHER no-speak foreigners are already queuing up for them?
Regarding stuff people said about English in office. Yes, huge corporations tend to have English as official language, and it is respected to varied degrees. But reality is, that majority of jobs are NOT in large companies but small to midsize. And there office language is more often Finnish than not.

