[xelasnave]

At the start I read that we have a singularity.
This I gather is where GR may not be applicable

Is the start an object as a very small point or is it expected that there may be a certain size, say a golf ball .. Does GR give room for something larger than the term singularity suggests..at least to me.
Is there an anology one could apply that could communicate the models suggestion of reality to a lay person...
I tried thinking of an infinitely dense alka selsa tablet but if it's infinitely dense it will fizz forever...so my attempt does not work.
I suspect our observation only goes back as far as the background radiation