Hi, FaithfulAndTrue,
I apologize - I jumped to a conclusion!

You are so right - you never did say that the creeds were inerrant. I had assumed that since you had provided this from a church source you belived to be true (inerrant) that it all followed.
My point was that, the Catholic Church has a long history - and if you firmly believe that God is Three Persons and not three gods, that Jesus Christ is the True God and True Man, that Mary is the Mother of God and that Christ, suffered, died and rose again to save us from sin. These are all original Catholic doctrines. The same God Inspired Church that gave you the NT identified the inspired works of what we called the OT. And, yes, this is the same Church that Christ founded on Peter and said the Gates of Hell would not prevail.
As I see it, this is really a long string of unbroken articles of Faith that have developed as Christianity developed. It did not arise fully formed - a lot of the work moved from understandins to defined doctrine because of the work of heretics who wanted to craft their own set of beliefs.
Accepting the NT as inerrant yet rejecting other documents becuase they are not inerrant (e.g., OT and creeds previously listed for starters) puts one in an awkward position, in my opinion.

About 1,500 years passed after the Canon was closed when removing 7 books fromt he OT was the new tradition of men.
At the time these works were put in the Canon, none of the original authors were alive or any contemporaneous witnesses. The Catholic Church is saying that the written documents were examined word for word and under the inspiration of the Holy Spirit certain works were taken as Inspired. Other works were seen as holy and inspirational - but, not inspired. And, still others were seen as pure fabrication like the Gnostic Gospels.
My guess is that if your group is adhering to the NT - it really needs to examine why this set of books has been determined to be inerrant - on their own. This would be not piggy backing on the work done by the Catholic Church and doing original research to make a decision. Now, it should be noted that while original research is very good - the promise made by Christ to the Apostles that the Holy Spirit would teach them all truth - was not make to those who left the Apostolic Group. These were the first bishops of the Catholic Church.
The same really applies to areas of doctrine as identified in the Creeds previously listed. If your church is using these Creeds of the Caholic Church - what is the basis for thinking that they are inerrant? Could God have more or less persons? What makes us think that Christ was True God and True Man? Could Christ lie to us - like saying His Body and Blood were really hidden under the forms of Bread and Wine? Heavy issues for those wishing to form their own church as they leave the one founded by Christ on Peter.
God bless
I’ve never claimed that the creeds where inerrant.
As for the OT, the CC added the Apocryphal books to the OT (1546 AD) as a response to the Reformation (1517 AD). The arguments for and against its divine inspiration could easily be its own large thread.