How does something come from nothing and life come from non life?
Something from nothing...
Well, you have to look at something and nothing as physical concepts, i.e. concepts of physics.
Something would consist of particles, radiation, forces, and spacetime.
Nothing would have no remaining particles, no remaining radiation, no remaining forces, and no remaining spacetime.
Particle physics attempts to get to nothing by creating vacuums of empty space or the lowest energy state.
Think of placing a marble in a ceramic bowl.
You've got all that kinetic energy as the marble moves around the bowl.
But once it stops moving, i.e. has virtually zero kinetic energy, there's still the marble's and the bowl's potential energy just sitting there with gravity.
Well what about removing that potential energy too?
That's what particle physicists call creating a vacuum.
Once you've created the LOWEST POSSIBLE energy state, you've created a vacuum of empty space void of particles and radiation.
When particle physicists reach this point, getting to no moving marble, no marble, no bowl, no table, no floor, no walls, no house, no particles, no radiation, nothing, there's a fundamental fluctuating of sub nuclear particles, their antiparticle pairs, and the forces there within that result in nothing because it's an instant annihilation.
What's better is that these particles do not distort space, in fact, they are fundamental to empty space, which means that when there was no remaining and expanding spacetime (no universe yet) there were still fluctuating-yet-never-remaining sub nuclear particles, their antiparticles and the forces there within leaving only annihilation.
All is annihilated, nothing remains.
This is nothing.
No particles, no radiation, no forces, no spacetime, nothing remains.
What's nice is that this fluctuating is unstable, and thus guarantees a particle to eventually avoid annihilation and result in a remaining particle, that takes up remaining space, which creates such a high energy density of such a small bit of space that it expands rapidly, and from nothing (fluctuating sub nuclear particles WITHOUT SPACE) we got something (remaining particles, radiation, spacteime, forces).
As for life from non life.
Inorganic compounds can react and become organic compounds in the form of amino acids and these amino acids from polypeptides, or chains of amino acids, and these polypeptides eventually fold onto themselves and become biologically active structures that can in fact metabolize compounds and catalyze reactions, so in this type of organic network, macromolecules that can replicate in a template directed manner would thrive, because they would be able to use the catalysis to further reactions that favor a greater emergence of more macromolecules and RNA is both auto catalytic and can replicate in a template directed manner, and because of available phosphorus in this prebiotic network, the amino acids and the RNA were able to be compartmentalized inside of a phosphorous encapsulation, and this would be the first living cell, because it would have replicated genetic polymers.