I'm a little confused about the endings / cases. I've seen both я and ль on the end of february... is ль the nominative? In which case, are we using я here to signify accusative or genitive?
Yes, "february" here is in the genitive, as it is the beginning OF february.
February in the nominative: февраль
February in the genitive: февраля
so the preposition of makes the case genitive
Yes, that's exactly how genitive works in English, either "of" before the word or the suffix 's.
this is confusing , how do i know when something begins in february , for example , how do i say , starts/begins in february in russian.
«SOMETHING начинается в феврале» if it regular. If you want to say it about future, «SOMETHING начнётся в феврале» will be better in many cases (present projection is not generally common in Russian).
What is difference between "начало" and "начале"?
Начале is the form used with в.
Why not in the beginning of February?
We wouldn't say "in the beginning of February", we'd say "at the beginning of February". The beginning is thought of as more a point of time than a range of time so "at" is more appropriate. "at the beginning" = в начале
I said this and it marked my answer wrong.