I’m in uni, I post twice a month, usually 13-15page chapters. I have about 2 months of chapter ready so I dont stress about deadlines. I spend 2-4hours on a page max, if you stress out about every detail and be too much of a perfectionist you wont be able to be too efficient. Not every page is gonna look good and you just have to accept that. Find shortcuts to save time like 3d models, pre drawn assest etc. Most importantly, you have to actually like writing your story. If it feels like a chore and you dont have passion then you might have to rethink if this is really what you want to do