Great post, glad you were able to get it all into words. My fiancee left the church (Grassie I think it was called?). I can tell you the first few years were tough. The first months had everything you expect - grieving parents, disappointment, they even had self-help books.
A book that really helped my partner was called Leaving the Fold (https://www.amazon.ca/Leaving-Fold-Former-Fundamentalists-Religion/dp/1933993235). I wish you luck.