While I can agree with some of that, I wouldn't start dating around again if I were you. If I her and you told me you wanted a second chance, then started dating somebody else, I wouldn't even bother.
At the same time, don't hold out forever for her. As you suggest, she'll probably see that the new guy isn't so great and maybe be willing to give you another shot.
I really can't answer your other questions, though.
