I don't know how I missed this thread previously.
When you say your Aunt(s) live a long way from you, how far would that be? A reasonable distance for someone with their own transportation, can be an extreme long distance for someone without.
Since you haven't even met your aunt(s), that somewhat reduces staying with her/them right now. Although related, they are strangers to you, as you are to them. Perhaps, you could arrange to meet them a few times to get to know and spend time with them before living with them, even temporarily, becomes an option.
I recall you have already turned 18, thereby implying you have or nearly have finished high school. Even if home schooled, you will need a HS diploma so ensure you obtain it by whatever means necessary.
Even as an adult, as long as you wish to remain living in your parents home, you will need to continue to (mostly) follow their rules.
As a JW man is expected to the spiritual leader for his family, your opposition places your father's elder position at risk, which will likely be why he wants you to play along. Your father is probably not only worried for his position, but also his failing to provide adequate spiritual headship for his daughter and his other children.
Since your thoughts are now known, perhaps you and your parents can compromise as to which JW activities you can agree to vs those which will act against your conscience, such as recruiting new members.
Reaching a compromise will require you to initiate some calm discussions. When either parent becomes increasingly short tempered and demanding, that is when you need to become more calm, stand your ground but remain in control.
I would be tempted to blame your decision against becoming a JW, on being pressured by your parents to become baptized now, as opposed to waiting until ready to make that decision on your own. Hopefully, that may force them to reconsider forcing your siblings to be baptized before they are each ready, and maybe, cause them to back-off in forcing you to do anything JW related.
Obtaining a FT job, even if only for summer, will permit you to earn some money and get you away from the house for extended hours each day. In addition, you gain some independence and experience while showing you are a reliable worker. It also may provide your parents with an excuse as to why you will not be available certain days such as for Saturday FS. Once you are away for extended hours each day, it will likely become easier as time advances, to miss more meetings, especially if you need to find another job in the fall.
We are all unique in not only who we are but also our situation in life. There are no answers that anyone can tell you, which will work for you in every situation. Part of becoming an adult, is the need to consider in advance, the pros and cons to every decision.