What happened before the Big Bang

First off, am not a physicist, cosmologist, astrophysicist or anything ist, well except atheist ๐Ÿ˜€ but because debates on this blog and elsewhere end up discussing the big bang and other serious science stuff that yours truly has just glossed over, I felt it is only fair that I share with you a vast repository of reference material that you can refer to.

Please tell me it helps, thank you ๐Ÿ™‚

What happened before the big bang