
Meaghan!! I'm Nikki!! Don't feel silly for not knowing all this stuff. Most of us didn't know it until we started our TTC journeys as well. Sadly, they don't teach you this stuff in Health Class. I never paid attention to my lower bits as much as I do now... so that's perfectly normal.
I wouldn't worry too much about the O day that FF is predicting for you right now, because this is only your first month charting. Once you've got a few charts on there, FF will start to learn about your body, your cycles and your patterns. Then it will give you much more accurate predictions.
As far as checking your CP goes... that does have a bit of a learning curve to it. The thing that helped me was this Rule of Thumb: an unfertile cervix feels firm like the tip of your nose, whereas a fertile cervix feels soft like your bottom lip. For height, I usually just gauge it by how far in my finger goes before I hit it. I am still unable to sort out the whole Open Closed thing, so I don't bother charting that.
One of the things you'll learn about this place... there isn't much that is considered TMI!! We discuss more about our private parts and their functions than you'd imagine. So don't you worry about grossing us out!!
I hope your O is able to hold off until DH gets home... but it does sound like it'll be soon. You've got all the signs!!
Best of Luck and tons of Baby

to you!!!