> Learn only 4 tenses. Past for one time events, past continuous, present, future. These are enough to go by and explain yourself. There is no future tense in Finnish. Or gendered personal pronouns. Oh and there’s about a gazillion words for snow. And god help you if you need to articulate that your spruce is returning.
I confess I also read this thinking 'this person hasn't tried learning Finnish'.
It's also trickier with more unusual languages because there aren't resources out there to the same extent as for more widely-spoken languages. I don't think there is an 'official' Memrise course for Finnish for example.