I have had 3 different answers to this. some say mold, some say bacteria, and some say no first organism.The evidence and arguments we have now indicate that there probably was no "first organism".
And many organisms today (almost all organisms, actually) have no "survival instinct" - they have no instincts at all, being too small and without the necessary organization.
So science really doesn't know. My last post said why I think the start to life is impossible without creation.
But lets get on to evolution, lets start at a single cell. Becasue science doesn't really know where to start.
So we have a single cell, without DNA. So what happen with this single cell when it starts to evolve?