Hi Christine, welcome to Nikonites. Beautiful eye ya got there.
I'll bet you have another one just like it on the other side of your face, right?
If you could fill out the rest of your profile, it would really help us in answering any and all of your questions. Things like where you live, gear you use, phone number (just kidding about the phone number
).
And yes, likeTracsoft said.....read your manual on the parts you want to learn about first. If it's not in the manual, ask in here. We're more than happy to "learn ya"!
Have fun, and looking forward to seeing some of your work.