Yeah, the pronoun use feels a little odd, especially with yo/tu/nosotr@s. But then again, even so, there are people conflating the -es plural marker with the -es second person present conjugation, and people saying "but whyyy can't you say 'quienes come' as well as 'quienes comen', and stuff.

Also lots of loltastic confusion about grammatical gender.

So ... yeah. I'm not taking Duolinguo as expert in anything (see also one sentence where the audio pronounced 'habla' as 'ow-bla', which made me wtf a bit) but it's useful for the "do a bit at a time without getting overwhelmed" aspect.