A autobiography is a tough sell. Even for the famous.
It'd be better to adapt personal experiences into a fictional character.
Or, a self-help book if you've got ideas on how your stories can help people.
Of course, I think you should still write it. The stories must be important to you, otherwise the question would never arise.
So write it, decide after if you still want to try to publish and market an autobiography - or simply use the material in some other way.
I myself, never read autobiographies. The one exception being Bruce Lee. And only watch the biographies on TV if their of people I think I can learn from. Stephen King for instance, I'd watch. However, if it's an actor, then I don't really care.