Good luck....not easy to cope and there is no wisdom that can be given here.
Slowly miss meetings and don't give an explanation to anyone.
Tell others you"re coping with some doubts but make sure you never say anything agaist the GB or the watchtower. You do that and you will be DF.
Was married for 26 years and my marriage ended because i did not believe anymore.
Moved to a Spanish congregation for a while even though i could not speak the language and slowly faded. It was beautiful exit.
Good luck.