You have to check it from time to time and keep up on it. It can take a while, but for the most part you can just go on about your business.
Since so many people are questing though, I do wish Blizzard would make the dual spec unlock more accessible for lower level players or alts. While you can certainly tank or heal if you’re a dps role, it’s much harder and people are less inclined to do it. It would be nice to see dual spec either discounted if you buy a training book for an alt, or even a change in the cost structure. For example, there’s 71 talent points for level 80. What if you could purchase the first 41 points of your talent spec for 300g, then it was 200g for the next 10 points, 200g for the next 10 points, and 200g for the final 10 points.
Anyway, just the same as it was for me, you’ll eventually find a group if you’re active about it. It doesn’t take a lot of effort but you do have to stay on it. If you don’t want to do that, that’s fine, you have the option to quest. This will get you to end-game. You don’t have to do the dungeons.