Don't sweat it, just do your best. If the Bible is true, and Korah and Solomon will get a resurrection, then I wouldn't worry. All we can do is to do our best. Use your DF freedom time to study TTATT. Christ knows your heart. If God is really all knowing, and is love, but has chosen to allow this system to continue and thereby cause suffering to us all, then why would he judged us adversely for being thrown into this situation just from being born?!
Just don't give up or play into the WTBTS guilt trip. Christians do not live their life as if paying a penance continually, that actually shows a lack of faith in the ransom. Which is why the WTBTS is such a guilt driven organization, they do not really know Christ or the Father. It's okay to be saddened if you mess up. That just shows that you have a good heart. You don't need the GB/Organization, they need you. Without your blind devotion, the Organization will disintergrate.