I've looked into similar trips such as the one you're looking at and I think it would be a fantastic experience. You get to meet Israelis, and you're immersed in Israeli culture which is something that a typical vacation ight not afford you. All of the trips that are organized for Americans are friendly to people with little or no knowledge of Judaism, you shouldn't have to worry about that. That's one of their primary purposes, to reconnect people who are lost to Judaism and the land of Israel. I don't know whether you should do this rather than a standard vacation to Israel, they both are good options, but as far as organized programs this is a good one.