Diana is A tall and athletic girl. She has brown eyes, short and black
hair and she wears AN/ONE ear-ring in her nose.
My cousin finished 'institution of higher education on degree subject of
humanities scholar' (nie, tak nie mowimy, dlaczego nie napisalas UNIVERSITY WITH A DEGREE IN HUMANITIES?).
However she doesn't work in this 'job' (nie, zle slowo, daj tutaj 'FIELD'). Besides (ale besides czego?) she helps older people abroad, because then she 'gives some cashes' (tego nie rozumiem).
Then we were writing 'with itself' NIE - tpo jest kalka z polskiego tutaj WITH EACH OTHER), as usual.