By "ModelManiac's Manual" I just meant "the manual for ModelManiac's camera."
Copying those manual pages longhand seems like overkill. Do you have a laptop, or a tablet, or a smart phone? If so, just keep it with you when you take pictures. Then the whole 300-page manual will be at your fingertips.
Your two test shots confirm beyond all doubt that the white balance is set wrong for the shots you're trying to take. In both shots the sheet of paper ought to look white. In the first shot it looks blue, in the second it's got a more purple cast - and that shot, as you said, is out of focus except in a stripe down the middle. (I have no idea why it's out of focus. Switching to "shutter priority" may have done it - especially if the paper was curved a little bit.)
I'm wondering if the fundamental problem is that, by the camera's definition, you simply don't have enough light. That might explain the whole problem; cameras often get fooled by low light. Try this: take two pictures of a blank sheet of white paper, in the same setting you use for shooting models. In one shot, leave the white balance and everything else set where they've been. In the second shot, use the camera's built-in flash. I'm betting the first picture will look bluish and the second will look just right. If I'm right, you need more light - a lot more - on your models. To your eye the light may look fine, but the camera sees light differently.
You might try taking a few model pictures with your built-in flash. You may not like the result, but it may be better than the blue pictures you've been getting.
Model photography is, by nature, a little trickier than taking snapshots. Your camera is perfectly capable of taking good model pictures, but it will take a little extra effort.
I take model pictures once a year for the members of our model club. I start by setting up two specially-balanced lights on stands wit umbrella reflectors, at different heights, pointing at the model from different angles. And I use a big paper backdrop. The camera is mounted on a tripod, so I can use slow shutter speeds. It's quite a ritual; it takes the best part of an afternoon to shoot four or five models. And the gear (not counting the camera) cost about $200.00. I don't suggest that your setup has to be that elaborate, but it looks like you need to make some changes to your shooting venue.
I think you need a little help from somebody who isn't on the other side of the planet. Is there a good camera store in your neighborhood, with a manager or employee who knows about light and white balance? Or a friend who's a photography enthusiast?
Another idea: do a post in the "Photographing Models" section of this Forum. Some real photography experts hang out there. Don Stauffer, for example, takes excellent pictures of his models in natural light.
i have a feeling that once somebody figures out just what settings to change I your camera, your pictures will look a lot better. Good luck.