Of course there are small-minded people in the world who are prejudiced against folks with physical differences and disabilities, but the universe contains plenty of men who would not let that get in the way of a good relationship. In fact, there are men and women who find amputees particularly attractive and most definitely sexy.
I can't tell you how to feel, but please be assured that lots of men would not be bothered at all, and who would not think that you were less beautiful or less sexy because of your hand.
I wish you the best of luck in your search for a great guy.