Awesome post! Thank you.
I think that I took the same route as you... coming to the OT through the NT. I believe that it was a good route for me and that it's showing fruit, so to speak.
One thing though that I've experienced is that many of the people that see the OT as legends that are meant to inspire (as opposed to any idea of literal accuracy) claim that when Jesus, or others, refer to the OT accounts, they are merely referring to the legends... not in any way ascribing accuracy to the accounts. They have been consistently dogmatic about it all... I don't know how to get around and get discouraged sometimes.
I have the same challenge. I more in latter years make Christ the focus of any talk on the word of God.
Like I said, His integrity and morality for me are above questioning. Christ I want to make as the center and circumference of the Bible.
For example, when someone complains about the conquest of the Canaanites from God, insisting that this or that slaughter
was immoral of God, I might say - "Well, you know the Person most qualified to indicate that God was immoral would be Jesus.
And interestingly He never said His Father was immoral. Rather He called His Father
"Righteous Father" (John 17:25) with no such condemnation of ANYTHING God did in the Old Testament."
The point pressed is that of all persons on earth Jesus Christ would be the most qualified to expose unrighteousness from any source.
He prayed
"Righteous Father, though the world has not known You, yet I have known You, and these have known that You have sent Me."
Another example:
Jesus taught that men who were preached to or judged by God in the Old Testament would stand with the contemporary audience at the last judgment.
Ninevite men will stand up in the judgment with this generation and will condemn it, because they repented at the preaching of Jonah, and behold, something more than Jonah is here. (Matt. 12:41)
Or
For if the works of power which took place in you had taken place in Sodom, it would have remained until today.
But I say to you that it will be more tolerable for the land of Sodom in the day of judgment than for you. (Matt. 11:23b,24)
How could mythical people stand with unmythyical people at the last judgment?
The strong implication is that Jesus took the book of Jonah as history.
So this approach requires that you love much and know well the New Testament. That is to accumulate all the statements
out of the mouth of Christ -being familiar with both these statements and the stories of the Old Testament.
There is no need to force the issue. But place the matter before the doubter of Christ's words and integrity.
Only thier own conscience can enlighten them under the conviction of the Holy Spirit.
"But Jesus Christ took this account as history. And Jesus Christ took that account as non-fiction.
And nothing suggests to me that Jesus Christ was given to superstition, exxageration, deception, etc. The sobermindedness
and realism of Jesus Christ to me is beyond reproach."
Besides, the goal of our witness is to bring them close to touching Christ, receiving Christ.
The relationship with Christ Himself must be more important. Some things they can resolve as they grow in spiritual life after
receiving Christ. Try to ever point them to the trustworthiness and availability of Jesus as paramount. This is not evasion.
This is focusing on the kernel, the nucleus of the Bible - the Son of God and knowing Him.