I have been reading this subreddit for months now and am still CLUELESS AS TO HOW YOU JOIN THIS SERVER

Let me give ye some backstory:

I have been reading this particular subreddit for a few months now, about the drama, about Columbia, about the Ancaps, about Foofed, about the various cities, about the lack of the usual minecraft server pay2win and tinpot dictator bullshit that usually discourages any attempt of mine to try SMP. Now that it has finally updated to 1.4.5 I wish to join but have no idea how to... could somebody please help?