I had the same issue with my comic...I wanted to get new pages out frequently, but that made it into an obligation, and then I lost desire to work on it. So I stopped for a whole year, before getting back into it. Settling on a scheduled that let me post at decided intervals that I could EASILY finish while still working on other stuff for fun worked to balance the joy and the sense of obligation. My pages are black and white, and done traditionally so there's only so big each page can be (and I can work on it while out and about), so my update scheduled turns out at twice a week. Since yours is more complicated, maybe like...the first and third Monday of every month? A set scheduled that gives you motivation to work on it, but time to do other stuff as well.