Hi there, Daacon and welcome!
Nice choice there with the K100d. Don't underestimate it - the thing is a great camera!
Hmmm. To answer your concerns about understanding the terminology, you can try this link:
Ultimate Exposure Computer
I hope it helps you. I give it a read every now and then, and if I need a refresher, I've kept it as a favourite in my Internet Explorer.
If you have a problem, don't hesitate to put up any questions you may have and I'm sure that either myself or the rest of the people here can help wherever they can.