The latest entry in Arrowverse universe is Batwoman, I wanted to jump into it but I am not up to date with Arrowverse shows. Like I have not seen Legends of Tomorrow from the last 2 seasons and Arrow's last season. So I want to know how much should I know from Arrowverse before jumping into Batwoman?
So I want to know how much should I know from Arrowverse before jumping into Batwoman?
At present (Oct 2019), Batwoman has no crossover or involvement with the rest of the Arrowverse that you need to catch up on although watching the original "pilot" which was the "Elseworlds" crossover episodes in December 2018 which introduced that character might be useful but it's not necessary as it essentially takes place after the "origin" pilot in Episode 1 where Kate becomes Batwoman.
That's not to say that there are no plans to feature crossovers in the future but we're only 2 episodes in at the time of this answer.