If I had just one small passage to hang my heart and mind upon today, this would be it: "So then, just as you received Christ Jesus as Lord, continue to live in him, rooted and built up in him, strengthened in the faith as you were taught, and overflowing with thankfulness." (Colossians 2:6-7)
For those of us who wonder where we are in life and what to do, this is it. We're in Christ. Keep remembering and reminding that.