Reaching the crossroad in life is never easy, plan a good trip on where you would love to go. Take up a hobby, something new never done previously I turned my hand to photography and enjoy looking through a lens at life.
Missing your Dad write your thoughts down, start a daily diary as if chatting to him, not easy you know yourself best and your family will stand with you in whatever you decide.
RE: Soul searching - What do you do without a specific goal in life?