Actually, it is not a too bad writing at all, although there are several imprecisions (but it is fine, don't worry ;)). If you allow me to give more information on four points:

• time is not really defined at t=0: it just does exist at that 'moment'.

• The photon conversion into matter-matter is not possible. The matter-antimatter asymmetry comes from somewhere else (actually, determining the someone else is a field of research at the moment).

• I have some troublres with the wording 'atom' that you use, but you explain it so that it is fine (although confusing).

• Quantum mechanics and relativity are unified, together with field theory into what is called quantum field theory. This is what describes all fundamental interactions and particle dynamics, gravity excepted. The unification with gravity is more problematic (and we actually do not know how to do it. Again, a field of research on its own). I guess this is somehow what you meant in your post.

Don't hesitate to come back to me if needed :)