Ok, jrjw, I never would have done this while "in".... but when I found out this was a big lie, nothing mattered anymore... about their fake organization.
When I left, I just put hours, magazines, rvs on my time sheet, just so that no one would know what I had not done. Question: Do you have a group of people you go with regularly? Is it easy to find a FS partner? or do you have to call people to get one? if you show up, does the conductor ask everyone what their plans are, or can you just "hang" and leave... saying "I have plans" when asked?
If you get your territory, make sure that you have a weird schedule, like everyone suggested (get a class during FS time on a Saturday) then, say I got a territory so I could go out on my own schedule. If they want to go with you, say "OK, when?" then say ok, leave, then text them saying "that won't work for me, something came up" and keep putting people off. Pretty soon they will get tired of you.
You could drive around, make a list of houses that "weren't home" and have a Not at Home slip ready to show to people, you could give them to people to work if they "want to help" Don't forget to cross some out, like you went back and 'found them home'.
If you DO end up "going", say "I am not prepared today, can you talk?" They won't like that either, and will start avoiding you. Or, if you somehow end up in "your territory" go there, send everyone out, then start feeling sick and go home. Or, if you can get to volunteer to be the "odd man out" and "have to work by yourself" just pretend to knock on the door, or go up to the door and introduce yourself as a student who is getting the reactions of people regarding child sex abuse, and ask them if they ever heard of the Australian Royal Commission and the report it made about all organizations in Australia.
You could do a 'survey' of what people know about JWs. Just to see if this 'preaching work' is really having any fruits. When I talked to some friends at work, they hardly knew ANYTHING about JWs. You could prepare an update for them. "JWs are actually a very high control religion, have you seen Leah Remini's show about Scientology? JWs are a lot like that, they do not believe in.....," etc.
Do your mom & dad want to work with you? follow you? or can you have your own schedule? "Going out early to do gas stations" is a good one if you go alone, you can just drive to Starbucks and have a coffee, or drive to a park, stay in your car and study.
Just do not feel guilty for anything. You have been tricked, now you deserve to escape.