You shouldn't spend too much time worrying about curation, I agree. But you should still do it. The lower your SP, the lower your rewards; but more is more, no matter how much you start with. And of course, upvoting thoughtful replies is just part of interacting with other Steemians.

Beyond that, it's not hard to find and follow a worthy curation trail. The trail I follow spreads votes across Sndbox, Utopian, and Curie content, among others. The votes and the rewards happen automagically.