Dude. If I played D&D tabletop with a new player, I, the DM, would explain who Shar is to my player. I would not say, "Look Shar up on the internet.".
As soon as Shar or anything Sharran related popped into the story, I'd make the player roll a Religion roll.
If they got a 5 or higher, I'd say, "You think you heard about this before, but the details are sketchy. She's a cleric, and her spell focus is an onyx stone. You think it might be to an evil goddess."
If they got a 10 or higher, I'd say, "You're not sure, but that could be the symbol of the evil goddess Shar, goddess of darkness and loss. Her cult is known for violent, wicked acts."
A 15 would be, "That is a symbol of Shar, most definitely. She is the goddess of darkness and loss. Her cult is violent and evil and it is very secretive. She is one of the primordial deities of Faerun, and she has a twin sister named Selune, goddess of the moon and light. They have been at war for countless centuries."
A 20 or more and I would tell the player all the above and say, "You know a LOT about Shar. If you run into anything additional that is Shar related, I'll just tell you about it and point it out. In fact, if you want to know more, look it up online. Your character knows all that you can find about Shar online."
I would most certainly NOT make my player look it up online. My players would lynch me. Why should it be any different for a video game? They can literally tell you in a few lines who Shar is and make it a part of the game that you, if you don't want to hear it, can literally hit the space bar and skip and players who know nothing about Shar would not be so totally lost.
This is apart of D&D people. It's a HUGE part of it. Players are not supposed to be expected to just magically know all the lore themselves. That's the DM's job.
