I hope you do-- it's always exciting to get one.
A spike will always appear on the side of the stem where the leaves attach, either between two leaves or under a leaf. I would say they look a little like a pixie ear when they first appear. As they develop, they have a little "mitten" thing at the tip.
There are photos of a couple of different early-stage spikes in the thread "Some Beginner Questions..."
Roots can also appear in the general area, but they are smoother.
At any rate, root or spike, it becomes clearer as it develops.
Good luck. I hope you have several