Just start going to flagged keeps, I feel like the problem with Cyro is that people just sit and wait to be in a group instead of riding to a flagged keep or responding to a call for defense. Then your pop says 3 bars but maybe 2 is actually doing anything, perhaps less if you count groups in IC or just derping around.
But if you take the imitative and learn to play on your own and assist wherever you can you’ll get better and you’ll have something to do while you wait to be invited.
I think one reason people are so against starting their own groups is because everyone expects the lead to know what they're doing and/or where they're going, and to have some basic strategic ability in deciding what locations to hit. I know that's personally why I never form groups out of people posting lfg; the infrequent periods I'm in Cyro, I'd rather not lead other people in aimless circles because I have no idea wtf I'm doing lol. I'll drop a 'lfg' in zone, but I'll also check the map and head out to where battles are happening. A lot of the time even if no one invites you to a group, you can find clumps of people to follow around.