Struggling w impossible goal

I joined scholars in August when I saw the topic of Finding Your Purpose bc I am 50 years old and it has always bothered me that I cant seem to find my purpose. The purpose i chose was “to become stronger physically and mentally” bc I felt that is what I need to do before I could do anything else. I am happy w that purpose and my results.
Here is my struggle: I cant seem to find an impossible goal and it feels just like I have felt my whole adult life! No idea what my purpose or goal is!
The ideas that I have generated for my ig just dont really resonate w me. Its almost like im just making stuff up.
What can I do to find my purpose and ig?