Picture yourself inside the expanding universe, not outside of it. The emergence of all things during the BB is happening everywhere around you. The light that is billions of light years away from you is heading towards you and the light that originates from your position is heading to someone billions of light years away. It''s important to realise that the BB did not have a position; it's the whole universe at all times during its expansion. Picture a 4x4 grid of dots, then picture the distance between each adjacent dot increasing... that's expansion. Also, picture each dot as a light source and you will see that light is coming at each dot from the other dots. It takes time, billions of years even, to receive signals from other parts of the universe to us and from us to everywhere else.