Wonders of the Solar System

just noticed this thread, are there many physicists on fgss? ..

It's probably a cosmologist you would want to talk to. Although 'at the end of the day'™ - it's all physics.

. . . decided to look up more about the start of the Universe, big bang?, what was before?, nothing?

There was no 'before'.

Also 'nothing' does not exist, so if there were a 'before' (which there cannot be) then it cannot be that.