2 pages a week is an appropriate amount of content for Tapas. A lot of people actually upload only one a week. If you have difficulty updating regularly, I suggest you build up buffer first, then start uploading slowly.
While writing takes less energy to whip up, it's not all about slapping words together and making a coherent sentence. It's building ambiance and setting from mere words. Whereas you can use darker colours to paint a grim scene in drawing, in writing, you only have one shade of colour to paint different moods.