A Believer do you have access to the " Kingdom Interlinear of The Christian Greek Scriptures" a word for word translation published by the WTB&TS ? from greek to English ?
If not seek one out , nowhere in the Greek text translated into English is the Tetragrammaton or an equivalent four Greek letters substituting for the Divine name.
So what that should tell you quite plainly is that the name Jehovah or even Yahweh does not belong in the Christian greek Scriptures /New Testament.
Also the first edition of the book" Aid To Bible Understanding" admitted that the name Jehovah was not the proper name for God , that it was probably more likely Yahweh .
The reason they gave for setling on the name Jehovah was because it was the most popular name in use at that time
So , on the one hand they say that christendom tries to hide the name and on the other hand they say it was the most popular name in use in Christendom ? Which is it ?
Also Catholic Bibles such as the Knox Translation consistently use the name Yahweh throughout the Old Testament and not just in a few texts.
Keep searching and researching A Believer
I wish you well on your journey.
Those days are gone when we relished a scriptual discussion with a householder ,the current JW has no desire to do so has been my experience.