Good on you Citizen of the earth for waking up to the JW insanity and having your own values of where loyalty should be placed.
As others advised, I also suggest you don't go to be humiliated by a bunch of window cleaners at a judicial committee, they are after your blood not your wisdom. In other words; don't feed the sharks.
You might phone in advance to let them know you won't be attending--worldly people are so polite! The experience of others from this site indicates no benefit will accrue since you are likely to be d/fd anyway but if you do choose to go, let us know how you got on.
As a practical measure and being independent of your family make sure you keep in employment to look after yourself and secondly keep your old comrades but make a network of new ones as well. If possible defy the ignorance of the JW org and get some college education under your belt. All the best to you and hold your head high.