You always have choices. You do not need to go back to the Witnesses. If you want to - that is your choice.
You can go to school to get a new career, you can meet new people by volunteering in your community, you can learn new things about planning for retirement and budgeting. All of it takes effort and you have to want to do them.
In reading your post it seems you feel like you are missing something in your life and you think the Witnesses are going to fill that void. In my experience looking for someone else to fill a void doesn’t work.