If you're looking for anatomical simplicity, there's a book that might work for you. And it's cheap, because it's paperback and it's from 1962, lol. It's called "Drawing the Head and Figure" by Jack Hamm.
You can find this book at your local Barnes and Noble, but it's cheaper online. The most expensive one I saw online was a little over $10, and I found one as cheap as $5. There are also PDFs for it.
You said you wanted advice on aligning the chest. Well, that's basically how this book teaches you. For every single body part, there's a measurement tool. For example, it shows you where the mouth goes by aligning its corners with a part of the eyes. It teaches you basic body shapes by drawing line-drawn scales. He uses circles, diamonds and other shapes to mark where certain bodily features go. And there's a bit of text next to all the pictures explaining how to do it. This makes it ideal for visual and auditory learners, because they can either look at the pictures, read how to do it, or both. It also shows you specifics on individual parts that people often have trouble with, like the hands, feet, face, hair, etc. And it teaches you how to draw different ages, from children to adults to the elderly. And it's all done very simplistically.
As long as you don't mind 50s style women's hair-dos, this book is fantastic. Oh yeah, and he has another book called "Cartooning the Head and Figure." This might work better for you since you're doing a manga. But I haven't seen that particular book myself. Anyway, "Drawing the Head and Figure" made it really simple to learn, and his tricks for remembering scales and measurement were really great.
Block out the chest first then and build from that. Just sketching the outlines won't really give you a lot of control over the volumes itself since you are literally just drawing the edges. This could help you shape the body as you want a lot easier since you aren't guessing as much where things should be based on a stick figure frame. The finished lines is just the end product.
Gotcha. I guess when I tried doing simpler anatomy I kind of got carried away with "simplicity". Thanks, I'll try that out! And as far as reference for the hand, I'm still stuck on how to do that. Lol. My hand is kind of jacked up from a car crash so I can't do that position without crammping up. :/