Hi, Andrewstx,
I will do my best. First it would be good to get a reference to get a foundation:
newadvent.org/cathen/15006b.htm
newadvent.org/cathen/02543a.htm
Basically, there are multiple types of writing in the Bible - just like there are multiple types of writing or literature in our own culture. Today, no one tries to hold scientific analysis to a poem - while this appears obvious - somehow this gets thrown out when considering the writings in the Bible. So, to claim that every word holds up to absolute scientific scrutiny is not reasonable - because we do not do this with our own literature…or with anyone else’s literature.
Where the concept of inerrancy comes in is that the truths of God’s message - error free - comes through in the words of men. For example, in the Genesis account of creation the error free message is God created everything freely out of nothing, God directly intervened in the creation of man, that God saw everything He made was good, and man freely chose to disobey God and sin entered the world. That is the message (well, part of it…

) and the human writers put this into words under the inspiration of God.
So, is the message error free? Yes.
Is this term inerrancy the same for Catholics as for Protestants? No.
Where the Catholic Church comes in is to say that certain parts of the Bible have a very particular, specific and defined meaning. Was there a fruit tree? talking serpent? fig leaf aprons? I don’t know and don’t push hard on the description because I do not think every word is a literal fact. Was all of creation the total and unforced work of God’s Will and design? Yes - and, I will stand very firm on that.
This is more of a personal answer - but, one that I feel is accurate and one that I believe.
Hope this helps.
God bless