Expressions - #1 nervous

At the moment, all I'm doing is basically trying to learn as much as I can. Always. And in order to do that I need to do a lot of exercise.

I found this helpful tutorial by Dani Jones which contains a lot of face expressions samples (50, to be precise) and I've decided to draw them myself.
So I've decided that I'm going to post them day by day... and I guess this will be a good exercise.
Here it is the first one...

Comments and suggestions are always appreciated!:)