They're all members of the TS group, so they'll all be in the same boat as you, so to speak. They may have had more experience at presenting in public, but they'll probably remember when they were at your stage. They'll hopefully be a source of comfort and advice on the next stages of your journey.

I look forward to reading a blog saying something along the lines of "It went better than I expected" or "they were all really nice" or "I don't know why I got so worked up about it" :)

You can do it if you really want - you've just got to try, and eventually you'll succeed. (paraphrased from this source)