I could answer all your questions and you'd have still more questions. The important concept you'd do well to concentrate as much of your awareness on is the simple fact that You. Are. Connected. To. Everything.
Meditate on it. Feel it. Live it.
When "stuff" comes up out of that pit of the unconscious mind embrace it or run away. The choice is yours and yours alone.
Being a student on Zen you'll know the answer to the koen "Who is the master who makes the grass green".
Trust your truest self. Trust Universe. I don't know if everything that happens to us is for a reason or not, but it does happen, and because it happens to all of us - individual reflections of the whole - it means you're never alone and you have the whole universe to support your journey.