We need to get past the "I am out of shape and do not look good" excuse for not rowing.
I understand the concern about not fitting in if you are not as fit as someone else in a rowing class. But consider a different perspective.
That perspective is that the ones not rowing, not exercising, not getting the pulse up and the breath deeper are the ones to be avoided (or, at least, not to serve as role models). There is something inherently attractive about making the effort, showing up, and moving that you should consider. Allow it to trump your hesitation or concern about being new to the game.
Get on the rowing machine. Go to a rowing class. Join a learn to row group.
Just as smiling can make you feel better, getting out there and moving not only will make you feel better, it makes you beautiful!