Welcome, glad you have found out the truth about the truth (sometimes called TTATT). I was 45 when I left. Although I wasted 30 years in the organization I have been making up for lost time, I am happily married (to someone who was never a JW), and have so many great memories, I am enjoying life.
It's hard to give direction on leaving, everyone is so different. If you don't have any close friends or family that will shun you, you have a lot of options. You can disassociate by letter, that will stop the elders from bugging you, but you will lose contact to any friends you have. You could do a fade, just gradually start doing less and less. That will probably result in a visit from the elders, you could just say you have issues with depression, that will give you time to transition. If you tell them you no longer accept the GB as being appointed by God you could be disfellowshipped.
I would start making plans and start making non JW friends so that you will have a support system in place should you DA, or be disfellowshipped.