This is my first game of D&D or any other tabletop role-playing game. I get the general idea of the mechanics from games such as Neverwinter Nights so I can understand dice rolling, spells, leveling, etc.
I have been asked to join a game of D&D by the DM. They are currently playing Icewind Dale: Rime of the Frostmaiden an my role will be embodying Vellynne Harpell. To my knowledge from what the DM told me, everything seems to match with what I could find here about her.
So far the DM has given me a general idea of the world and the story, a general idea of who my character is and walked my through building the character sheet.
I know he will help me get up to speed, but I would like to be as prepared as I can for the first day so I can be a good addition to the party and bring realism to my character.
What should I know about the world as Vellynne Harpell?
What additional information should I ask for?
Is there anything I should definitely know as a new D&D player?