Notes on my ZZ Plant

I've had my ZZ plant (Zamioculcas zamiifolia) for about eight months now and I'm finally seeing new growth on the stems—I was worried for a bit because it seemed totally dormant at first. I keep it in bright indirect light and water maybe once a month, which seems to be working. Has anyone else found theirs surprisingly slow to establish? I'd love to know if that's normal or if I'm doing something wrong.