That’s your great, great great, great etc grandpa right there.
If this stuff interests you I would like to recommend Dawkins' 'The Ancestor's Tale', it is pretty accessible and walks you back through time step-by-step.
See https://en.wikipedia.org/wiki/Last_universal_common_ancestor for more info:
> The LUCA is not the first life on Earth; it may have lived among a diversity of other organisms whose descendants all died out. Rather LUCA is the most recent form from which all surviving life on Earth is descended.
This thing has the coolest warp bubble I've seen.
Wish I knew more about biology. I tried a couple of introductory molecular biology lectures and while I found them very interesting, both times I started feeling quite lost by the 3rd hour. So much chemistry and physics to learn. I wish I was smarter and better educated