It would be really helpful if the gender of a word would be displayed when hovering over it. Like in the German course.
On principle I have never (ever) used hovering hints in german. Or italian or french. Too much of a crutch, l've thought. But in slavic languages I do use them, I must say. I extensively use online and offline dictionaries, with shortcuts on the desktop, for all languages. Opening in a different browser for no ads.
Мой, моя, моё, are first person, possessive, singular pronouns in the nominative (but not necessarily exclusively the nominative) case, corresponding to masculine, feminine, and neuter genders respectively. Я, мне, меня, are first person, singular pronouns, corresponding, but not limited, to the nominative, prepositional, and genitive cases respectively.
When to use them is best answered with tables, so here they are:
Pronoun tables - http://www.russianlessons.net/grammar/pronouns.php
A table of the cases and their uses - http://www.alphadictionary.com/rusgrammar/casefunc.html
O/c, the gender of the noun determines the gender of the possessive pronoun to which it belongs.
@Mel (it won't let me reply to your post) I don't know declension of neuter nouns yet, but that might be it?
I put моё масла 3 times then on fourth time it took it as right answer.......