Go for it Physicsgirl.
I wonder what would have happened if Sir Edmund Hillary had looked at Mount Everest and said, �I can�t do it.�
And there were lots of folks who said he couldn�t do it, or he shouldn�t do it, as it was too much of a challenge for him.
But he did do it, and he had willing help from Tenzing Norgay and his team leader, John Hunt.
There are many Tensing Norgays and John Hunts on the AB site, so climb your mountain Physicsgirl. One day you will reach the top.
Good luck to you.