is zen ok for new support players?

I just started playing zen and I really like it. Really fun mix of support and damage dealing. I keep getting messages in chat saying that they need more healing from me. It could just be salty players, but I do feel like his healing is a bit low. I typically always start the match by placing the harmony orb on the tank, then moving it around to whoever has the least amount of health. Is there a way I can increase healing, or am I doing fine?