Hi desib, if its any consolation to you, I've never been a JW, I'm a 'mainstream' Christian - and I struggle with the Trinity too!! I really don't think its a salvation issue, you are where you are for now and God knows that point because He sees your heart. I think He'd rather have a sincere believer who treads carefully and studies their beliefs than one who clings blindly to any doctrine without reason
The one thing I did notice in your initial post is that you spoke of Jesus and God (Jehovah) being one - I'm wondering whether you're taking the modalist view? So you've always identified God/Jehovah as 'the Father' - therefore Jesus can't be the Father/Jehovah/God as well? That's correct!
To try to get a Trinitarian view, you need to differentiate between Jehovah/God and Father.
'Godness' is the essence/nature which the three seperate persons - Father, Son and Holy Spirit possess.
For a very basic illustration, all the posters here possess the same human nature - but we're all seperate people.
But it's still very confusing even after that lol!
Peace to you