To my knowledge in Faerun, Drow male cannot become a Cleric of Lolth. Which is one of the key characteristics of a typical evil Drow society which is predominantly sexist and racist.
Surely it is a mistake of Larian and it will be fixed, right?
Or did the Lore change to be more "SWJ PC"?
You are an abomination either way.
OnT: Your PC is always a Baldurian/surface dweller (right? I'm actually not sure...), but yeah, it still doesn't make sense if he becomes a cleric of Lolth. Maybe he used to be female? Maybe he's just very confused and only his parents accept him for the cleric of Lolth that he belives himself to be?