We cannot offer any advice or help here on how to leave the cult of the Jehovah’s Witness community.
However, for Jehovah’s Witnesses who want to take this step, there are various offers of help.

A good overview and starting point for further research is provided, for example, by the website and link list of Netzwerk Sektenausstieg e. V. (mainly in German): https://www.sektenausstieg.net/links.