It all depends on how you define life, some argue that there was pre single cell organism life in the form of acids like DNA and RNA more than 400 million years ago.
But if you take the standard characteristics of living things
Living things are made of cells.
Living things obtain and use energy.
Living things grow and develop.
Living things reproduce.
Living things respond to their environment.
Living things adapt to their environment.
Then single celled organism are the first to live on earth, and yes life imetiririka as you put it, although it did so with no particular direction in mind.
Which direction are you headed?