Yogosan14,
Welcome to the forum and congratulations. I admire your courage, analytical thinking and decency in your approach to difficult problems. And it is especially encouraging that you are taking an assimilative approach vs. the one which condemns all other paths of faith and disregards any other good will.
I cannot give you advice on these matters in an absolute sense. I think I've got a lot to learn still myself. But I do believe that God places us on this earth so that we will learn and help others. So with that in mind, I would just like to say a few words about the Bible.
One of the chasms between Protestants and Catholics, it would seem to me, is the notion of the Bible itself. And when we speak of the Bible we often use the words "Testament" and "canon". Subsequent to Martin Luther's protest, the expression "sola scriptura" has been added to the list of those terms in Protestant though - and subsequent to that the notion of "inerrancy". Once something has become "inerrant", then it becomes an important struggle either to interpret that inerrancy with authority or to provide the translation on which it is based. The Catholic view of the Bible was for a long time affected by the notion of a City of God on earth - and that the establishment of that city immediately followed Christ's sojourn on earth and resurrection signaling redemption. In the latter case, this has resulted in long periods of relative neglect, but also a fresh start when the Bible is looked at with new eyes.
Your own observations about the Bible are an illustration of looking at its words with fresh eyes.
So let's go back to the word "testament". This is what writers at a given time, either in collaboration or on their own recorded as their notion of man's relation to God. These are in turn the accounts our ancestors collected and stood by ( and elsewhere they gave their reasons or provided supplements) convinced of their authenticity, divine inspiration or else both. And these are the testaments that we turn to to begin our own examinations of concern to us: our relations to God and our obligations to our neighbors and family here on earth...
You are off to an excellent start in studying these matters. Keep up the good work. And don't be afraid to check your course now and then.
Best regards,
K.