Doing something that you've never done before can be scary. It can be stressful. It can be daunting. Will you be able to do it? How will it turn out? Will people accept it?
But perception is reality, people. Look at it as doing something new. New is exciting. New is enriching. New is fulfilling.
Doesn't sound so bad now, huh?!? If you open your mind to the doors that can be opened by trying something new you will wonder what took you so long to walk that path. Stepping out of your comfort zone is one of the best ways to grow yourself mentally, emotionally, and physically. Check out this article on stress management and how stepping out of your comfort zone is beneficial to your health. Or this journal entry from CrossFit; the second fitness standard explains how constant variation in exercise is beneficial.
How on earth will you know how something will effect you until you try it? Worst case scenario, if it doesn't work out, at least you will know to never do it again. Better case scenario is that you will gain insight on another way to try it. Best case scenario you see the light at the end of the tunnel and you ain't never turning back!