#2
Go to Guitar Center or a guitar store and try it out.

We don't know how you play, what your skill level is, nor do we know anything else about you. YOU are the final judge. Just go there and try stuff out on an amp close to yours.
#3
I think you will find the selection at any guitar store for lefties pretty slim. If they have any at all. Ive dealing with it for years. They will have some model of strat thats been hanging there for years. And thats about it. You will probably need to order one off the sites on the web. Most companies make one or 2 models and in only 1 or 2 colors with no options. If they make one at all. I just make my own now so I can have what I want.