My dear friend in Christ,
I disagree, and here's why
A correct understanding of the Bible {which BTW is a Catholic Book}, is that indeed the two major segments are intimately joined. The OT leads to the NT, which completes, fulfills, and even perfects the OT. The NT in many ways explains the OT, making it easier to comprehend.
That is why in my Catholic Catechesis for FIRST time readers of the bible, I suggest reading the NT forst, then the OT. And Here is WHY I do so:
[1] IN many way's the NT makes "sense" out of the OT.
Among many other things the NT points out the consistency of Just One. One God, One faith and One Chosen people
The use of priest in the OT being expanded and perfected in the NT through the Institution of the Seven sacraments by Jesus. From Baptism,{Jn 3:5} to Sacramental Confession {Jn 0:19-23} GOD"S WAY of sin forgiveness, to the Eucharist; the GIFT of Jesus Himself in Catholic Holy Communion as testified to by FIVE separate authors of the NT. ; and so-on.
[2] IN reading the OT first a novice can easily get a wrong impression of GOD, who can "come-off" as being vengeful, and even mean and cruel. When in FACT the God of the OT is the same God of the NT, now made visible through Jesus.
GOD can be briefly defined as "ALL Good things Perfected". Hence we can know that God can ONLY do and Desire GOD THINGS. So when we read in the OT of God inflicting severe actions; we can, if we take the time, discern that in each and every such case; God is ONLY being GOD. Because being Fair, being Just are GOOD things and God is exercising His Right; His Duty to punish evil and reward good.
[3] By first gaining insight into the incomprehensible love of GOD for His Created Humanity:
Rom.5:[
8] But God shows his love for us in that while we were yet sinners Christ died for us..... we are better able to grasp the true Divine Nature and it's relationship to man.
[4] Yahweh in the OT is a hidden and feared God{not rightly and fully understood God} And certainly this is ONE of the many aspects of God which is not to overshadow the other attributes. .... Because of Grace, NOW made available to man in order to make man's salvation an enhanced possibility {salvation and redemption NOT having the same identical meaning}; makes evident God Love and Mercy. So very helpful when reading the OT.
So for THESE and many other reason, for novice bible readers, it seems prudent to first read the NT.
God Bless you
Patrick