Focus more on this life and what you are drawn to in this life. The search and understanding of past lifes really is to just gain a little insight into how things effect you in this and maybe a little fun along the way as I see it. The one best person to be able to tap into ones past lifes is you, by dwelving into the subconsious which is best obtained in Meditation.
Ask you these questions.
Are you drawn to Shamanism?
Is Shamanism something that seems to be placed in front of you alot?
Are you learning Shamanism or have the desire of learning Shamanism?
After all this is the life you are living right now, today, focus on what you want to do with this life
Blessings Misty