No, it doesn't mean you suck. My coach usually puts the players out there that can throw the farthest. So I get put out there a lot because my team sucks at having a cut off player, so I have to be able to throw all the way in.
Just come out and say it. She will be very surprised, and trust me she will love you even more than before after you say it! ♥
It depends on how long you've been playing or if its your first year, I've been playing for 9 years, and I love pitching, and first base. But if your just starting out, I would say, left field or center field.