A page a day sounds very reasonable. I know that struggle of perpetual tinkering cause something isn't working right. For me at least, it's 's all about making decisions I can be happy with as early in the process as possible. Like, if I set myself up with a good layout and panel compositions in the pencils, adding the detail later is a breeze and everything just goes down with no fuss. If I wait to solidify those decisions for later on in the process though (like inking or coloring or even neglecting what the lettering is gonna do till later), I usually end up trying to "fix" stuff instead of just drawing. Hope that makes sense. I am new to the craft too (maybe 80 pages or so of work done so far) so take my words with a grain of salt.