Moderators from various Paradox speedrunning leaderboards have gone together to create a common discord server for all Paradox speedrunning. It's part of an effort to create a more interconnected community between games, so feel free to join in on that server if you want: https://discord.gg/R6cqEYtsTW

We've also made a new subreddit for a similar purpose, so if you use Reddit then maybe consider checking that out also: https://www.reddit.com/r/ParadoxSpeedruns/