What Have I Done? And What Will I Do?

I keep thinking about writing my memoirs. (Don't roll your eyes, my life HAS been interesting!) When it comes to experiences I think I have pretty much covered the spectrum. Well, painful experiences anyway. I have never traveled outside the US or fought in a war, but when it comes to understanding human suffering, I should have a PHD. 

Now when you read that last sentence, did you instantly think I was feeling sorry for myself? I would really like to know, because that one problem is what is stopping me from starting. I don't want to come off as a whiner. But much of my story is pretty raw and often brutal. And I actually don't feel sorry for myself in the least, not anymore. How can someone who has not only survived but is thriving have any time for self-pity? 

The reason I want to write my memoir is because I honestly believe that my story is unique, what happened and how I lived with it all and ended up where I am today. It just seems like such a daunting tasks and I wonder if I am emotionally ready. Sometimes I fluctuate between just writing the story in different short stories and making it fiction, to take myself out of the equation. 

I am not sure where to start.