Manuals are pretty "dry" reading, I'll agree. Here's a book that I found helpful:
The Digital Photography Book, by Scott Kelby.
It's written so that each page is a self-contained tip/instruction. It's also geared towards the beginner, so you can follow along and try it yourself. You can skip around and find the tip you need help with. It's about $14 at Amazon, and well worth it. It's much easier and more enjoyable than reading the manual (though you should still read as much of the manual as you can stand - there's good info in there).
One thing to keep in mind is that SLRs are not point and shoot cameras, and the K10D is not the entry level camera from Pentax. They are assuming a certain level of knowledge in the controls, menu and manual. Scott Kelby's book can help you get up to speed quickly.
Finally, have fun with it. Try a setting, take some shots and see what happens. The film is free.