I pretty much agre with Popa, with the small caveat that the OP is already Jewish – it is observing Jewishly that is in question.
On another note, there have been a few posts here about NCSY. I know that in some regions there is quite a bit of outreach to teens that are on the fringes of the MO world, but where I live, more than 90% of NCSY’s work is done with kids in public schools or non observant kids from non orthodox homes who are in the community high schools. There is an ongoing and quite serious internal debate within NCSY as to where best to deploy the limited resources available. The maskono has been that each region and sometimes each chapter has to determine what the facts on the ground are in each community, and do what is most productive there.
As to an ideological agenda, its not done so much, at least not until the participant has made a determination to be frum and for example spend a year in Israel in Yeshiva, Seminary, or other program. At that point hashkafic questions crystallize a bit more, but ultimately what drives the directors and advisors I know is what is best for the participant.