Writing for myself and writing for another artist are two very different experiences. When I handle both the story and the art, I have full control. I can endlessly tweak every word and every line.
This is a profession for me, but I started off as a self-publisher working on my own schedule and my own stuff before moving on to graphic novels with First Second Books, where there was definitely a schedule, but it was very different from monthly comics.
In 2000, Pope John Paul II canonized 120 saints of China, 87 of whom were ethnically Chinese. My home church was incredibly excited because this was the first time the Roman Catholic Church acknowledged Chinese citizens in this way.
We have to allow ourselves the freedom to make mistakes, including cultural mistakes, in our first drafts. I believe it's okay to get cultural details wrong in your first draft. It's okay if stereotypes emerge. It just means that your experience is limited, that you're human.
Ch'in Shih-huang is the first emperor of China. He united seven separate kingdoms into a single nation. He built the Great Wall and was buried with the terra-cotta soldiers. The Chinese have mixed feelings about him. They're proud of the nation he created, but he was a maniacal tyrant.