I get your point, but I think we have a lot more than a "faint clue" as to our origins
Ok, I'll give it a shot, Keep in mind I am a layman, and each area I mention is a specialised area of scientific study.
1, There was a cosmological event which has been called the "Big Bang", This event filled the universe with vast clouds of helium and hydrogen atoms.
2, Gravity caused these vast clouds of hydrogen and helium atoms to collapse into Billions and billions of balls of gas
3, These large balls of Hydrogen and helium gas were so huge, that the pressure at there centre caused the Hydrogen and helium atoms at their centre to start fusing together, This process is called nuclear fusion and releases vast amounts of energy (heat, light/radiation etc) as the atoms fuse.
4, We call these big nuclear fusion powered balls of gas stars (or our own one is called "The Sun")
5, As these stars continue fusing hydrogen and helium atoms together, they create new atoms, so Inside the star hydrogen and helium atoms are slowly turning into new heavier and heavier atoms such as Lithium, Beryllium, Boron,Carbon,Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese and Iron
6, Eventually the the star starts running out of atoms to fuse since the pressure of a star can not fuse atoms that are heavier than Iron, and the centre begins to cool. As the centre cools and the star begins to die, in some cases it collapses in on itself and the shock wave causes the star to explode into a super nova.
7, The intense heat and pressure caused by the star exploding into a supernova is enough for the atoms to be fused into elements heavier than Iron, So all the rest of the elements on the periodic table are then produced.
8, After the super nova explosion we now have another vast cloud of gas, But it no longer is pristine hydrogen and helium, It is enriched with all the elements of the periodic table, ie oxygen, carban, iron ,uranium etc.
9, over time the cloud begins to collapse with gravity again, Some of the residual hydrogen and helium left from the original star forms a new smaller star in the centre, a bunch of the heavier elements that when blown out begin to clump together with gravity forming planets orbiting this new smaller star.
10, The elements that were created in the original star also form molecules, eg. hydrogen and oxygen bond to make water. etc
11, One of these lumps of mass made up of the various elements orbiting the star is our planet earth,
12, These new new heavier elements allow all sorts of molecules to form, and allow complex chemistry to take place, the early earth would have been hot and radio active.
13, At some point abiogenesis happened, meaning a molecule formed that could replicate itself, it would have been nothing like the complex life we have now, but this molecule would have used the elements around it to form more of it’s self.
14, this self replicating molecule continued replicating and through mutations and the powerful hand of natural selection gave rise to the many species that have existed through out time.
15, And hear we are today, we are an unbroken chain of complex self replicating chemistry, sitting on a rock, formed from the contents of an exploding star.