The first cell organizing itself into a functioning replicating organism is even more facinating.
A very good observation! A functioning cell that reproduces itself with inheritance of the parent's/parents' traits, including a material and energy processing mechanism to support that reproduction, is the engine that powers evolution by natural selection. That first step is the most important one.
Another important step is at the other end of the journey: death! The cycle of birth, life, and death ensures a continuous renewal, so the better adapted can thrive while the poorly adapted decline. Death works hand in hand with reproduction, providing the opportunities for natural selection to occur. In this imperfect world death should be considered the alternative not to life, but rather to extinction.
[edited for wording and style]