Welcome !
I hope you are enjoying your new K-5 as much as I am. I just got mine about 4 months ago and am still learning about all the different things it can do and how to do them.
The link below is to an excerpt from a post written by Robert Johnston, a photographer that I admire, that provides what I thought was a simple but effective method of using that K-5 manual ( or any other manual ) and maybe making it seem a little less daunting.
Anyway, it is a terrific camera. Enjoy !
https://www.pentaxforums.com/forums/attachments/29-welcomes-introductions/109398d1321669028-my-first-dslr-pentax-k5-robert-johnston-quote-.pdf