I think next to an eastern window will be just fine. Photo Synthesis mentioned on a separate topic that he/she grows their plants outside in bright indirect light, where they receive direct sun at morning and at dusk, and their plant is growing quite well. Yours should definitely do perfect there.

Sunlight coming in from an east or west direction comes in at an angle and isn't as intense as sunlight bearing down on us from directly overhead during the afternoon hours. Your ZZ plant will love it.

Now that the Fall Equinox has passed, and the Sun is moving further south for the winter, the sunlight comes in at an angle all day long. It's more dispersed and less intense. So I've moved my ZZ plant further out into the open to soak up more sunlight throughout the day. It is getting direct sunlight all day long now, but I keep a close watch on it. I wouldn't even think of doing this during the summer. It would most definitely get sunburned. But as I said, the Sun is moving into the Southern Hemisphere for the winter, and the sunlight that reaches us is more spread out and weaker.

Since your plant is still young, I wouldn't recommend trying this. I only mention it to point out the fact that just because plants tolerate low light levels, it doesn't mean that they prefer it that way. I keep all of my plants on the brighter end of the spectrum, giving them as much sunlight as they can tolerate, not less. That sunny eastern window will make a great home for your ZZ plant.

Thank you for that explanation Photo. I thought I was crazy the other day when I took a few plants back out on my patio to give them a good watering and some sun, since the weather was nice. It was more of a dappled sun and I knew that that spot had sun all summer while my plants were there.

That was a great great answer, Photo. Delivered like a true teacher at heart.