I like to think that there can be a heaven right after our passing over. But there are also Bible quotes saying that heaven comes only at the end of times. It confuses me. Is it easy to end this confusion?
Yes, it is an easy answer that is hard to employ. What is hard about it isn't the theory, but seeing things from God's point of view.
The theory is simple. God doesn't see things how we do. He invented time, and isn't subject to it. So to him it is all one and the same. He spoke and it is done. See? Simple.
Truth is I don't know how he sees it, but I think there is something to that theory. All this temporal business we (and even his Son, and the plan of Redemption) had to go through took no time at all in God's economy.
Side issue: As corollary to the above, God is forever wounded for our sake.
Side issue: The consternation may be moot that we feel and try to reason away at the thought of never-ending torment of the Lost in the Lake of Fire --though never over with, the torment may not have any relation to the passage of time.
But as we go through this temporal existence, forced to submit to time in this way and that, learning Godly things such as patience, making priorities, giving up ambitions and desires for God's sake, somehow relates to learning God's point of view --and it is hard to do.
Meanwhile, the whole of creation waits in eager anticipation for the sons of God to be revealed.