Hello Pomeranian, there is much to discuss in your OP, but I'd like to start here.
There have been many over the millennia who have believed what you do about dreams, signs, visions, prophesies, words of knowledge, etc., that they received them directly from God. In some cases they were correct, but in others, they were horribly wrong (David Koresh and Jim Jones come quickly to mind as contemporary examples of the latter).
So, how do we discern what does and/or does not from God? The first and principle way is through the Bible, because it's the available resource that we have from Him that's made up of His "breathed" words exclusively ..
2 Timothy 3:16-17.
God is immutable, from everlasting to everlasting, and His word to us never changes. You mentioned that the Father told you that
"young Christians" will be
"lost to Christ", but Jesus tells us that no Christian will ~ever~ be lost to Him......................
"
All that the Father gives Me
will come to Me, and .. of
all that He has given Me,
I LOSE NOTHING, but raise it up on the last day" ..
John 6:37-40, 44 (excerpt)
.......................so we know that the interpretation of your dream could not have come from God, because God never contradicts Himself.
I'm not big on recommending books and videos to people out here in online Christendom, but I think this one,
The God Who Speaks (which is an extremely well done 2018 documentary/movie about God's word), may prove to be useful to you, at least as a good place to start. It's an all-star cast (so to speak) of pastors, theologians, apologists, historians, and linguists, and it can be rented or purchased at Amazon, or watched for free right now if you are an Amazon Prime member.
~Deut
Psalm 1
1 HOW blessed is the man who does not walk in the counsel of the wicked,
Nor stand in the path of sinners,
Nor sit in the seat of scoffers!
2 But his delight is in the law of the LORD,
And in His law he meditates day and night.
3 And he will be like a tree firmly planted by streams of water,
Which yields its fruit in its season,
And its leaf does not wither;
And in whatever he does, he prospers.
.