It's interesting reading the experience of a more recent convert, as I was born into the cult myself. A lot of the stranger things (you need to wear a suit, you need to report your time, etc) just seem normal when it's been that way your entire life.
They love-bombed you until you were locked in (baptized) at which point they switch and just saddle you with as much "priveledge" as they can. I'd echo the sentiments of others here, if you have no family in the cult, just stop going. They only have power over you if you give it to them. Personally, if my wife wasn't so indoctrinated, I'd dissassociate myself just to shock the congregation...in your case, though, everyone would probably assume that you relapsed and were disfellowshiped and no one would think anything of it. Just stop going, and if any non-elders call, maybe share a little TTATT (the truth about the truth) with 'em.
It's so remarkable to me that everyone's journey out of the cult is so different. For me, it was entirely problems with the doctrine, but for others it's issues with pedophiles, injustice in the congregation, or the importance of status to having any social circle, or like you expressed, the clear lack of personal concern for you until they decide that they need to push you to "confess" something.
Be grateful that you saw the cult for what it was so quickly. Many get married to a JW, or employed by one, and end up trapped for the sake of those relationships. Regardless of that, though, it's definitely a mindf*** waking up to the reality of the cult. I encourage you to seek out your family and true friends outside of the cult and get their support ask you remove yourself. Humans are social beings and huge changes to our social structure can be tramatic, so be prepared. I wish you the best of luck with your exit and continued sobriety.