I update three times a week. Mine is mostly B&W, so it's a bit faster for me to make than colour pages. I draw when I'm not at work or sleeping.
Just work at the pace that won't burn you out and start hating what you're doing. It looks like you put a lot of thought and effort into making your comic, which looks great btw, so if weekly is doable, go for it, otherwise keep with the schedule you can do without adding more stress to your life.