One thing to consider Protestants use something like 93% of the Bible Canon put together by the Father’s of the Church minus 7 books.
So that means they accept 93% of the Churches authority why not all of it?
The problem with Sola Scriptura is that you can’t accept the Bible alone with out first accepting the authority that put the canon together and if you accept 93% of it why not 100% of it?
Those who put the canon together did so because of false gospels that had been written around the same time or shortly afterwards that were floating around.
We call these the Gnostic gospels and there has been a resurgence interest in them.
People today believe that the Church was hiding something by suppressing them.
It would be like a rival group of Jews writing a Gnostic Old Testament book claiming Moses was a circus clown or something obscure and clearly herectical.
So the Church decided on what was officially scripture and we got the Bible.
The Bible does not serve as an ultimate guide to theology or on Church doctrine or liturgy.
Scripture is separate from these things and we use scripture, history and tradition to form these.
Just realize as a Protestant you put your authority in the reformers or yourself but in any case someone defines scripture and doctrine for you.
I would put my faith in those that formed the canon.