How hard can it be to walk up and down in a straight line? You just need to put one step in front of another; most people do it all the time. What's the worst that can happen? You fall over. Sometimes that happens to non-models, too; it wouldn't be the end of the world.
I think there is something to be said for not feeling like just because you're a model you have to be dressed up, look amazing, go to every party, and be smiling all the time.
My favourite smell is horses. In fact, most of the time, I do smell like horses.
I find it quite boring when people do things that are very considered and thought through. I like things best when they're just done because they're fun or beautiful, or simply because they are what that one person wanted to do at that one time.
If you always feel like an imposter, you work harder, and that makes you better at your job. You've got to keep a level of variation; otherwise, you'll end up talking about nails and beauty products all the time.