OP, how good do you want to be?
Continental is better because you can hit every type of serve better than with an Eastern Forehand grip, because the wrist is much more free to move. Thus allowing more spin, power, and accuracy.
It is harder to learn and you can get to a pretty decent level with an Eastern Grip serve.
Are you willing to go practice a ton of serves with a Continental grip and perhaps go to a pro to help you learn?