I never played the first 2 Baldur's Gate games either .Up until BG3 my only experience of D&D games set in the Forgotten Realms were the 2 Dark Alliance titles on the PlayStation 2 which I loved and Neverwinter on the PS4 which I must have sunk a couple of hundred hours into.
I haven't played either of the Divinity games. I tried Divinity 2 and played for like an hour before uninstalling it. I think BG3 spoiled me and set my standards to high, without the dice rolls, 5e rule set and classic D&D races and classes I just didnt see myself getting into the Divinity games.
This youtuber has a couple really well made videos that cover the BG 1 and 2 storylines I have been binge watching alot of this dude.
The Divinity games that I tried were: Divinity Original Sin, which I couldn't play because it felt like it was a co-op game and playing in single player.... I felt like I was talking to myself, and competing against myself for dialogue rolls, haha...
Divinity Original Sin 2 however! That was so much fun and indepth and felt like a proper experience, I loved it.
Will have to watch this guy's youtube and get the BG story!!
His vids are really well made ,I've studied video editing for a long time and found myself thinking damn son you put in the hours on these things!
There not super long both under 20 mins I believe.
The Descent into Avernus Dungeons and Dragons campaign has highly influenced the BG3 storyline, making pacts with Devils and the like is a pretty cool theme.