No, you seem to have a reading problem. Jesus is the firstfruits now. It is an ongoing reality. You do not seem to grasp that. This is not just simply a historic event, this phrase describes who Jesus is today.
No, you don't understand the firstfruits are those OT redeemed. All are made alive, not just Christ, because Christ was never in Adam's dead state. Christ is not the one receiving redemption out of Adam's condition. Christ was the one doing the act that redeemed lost humanity. The firstfruits are the one's being made alive in Christ. The OT were the ones to receive the physical resurrection out of the valley of the shadow of death, Abraham's bosom.
"But now is Christ risen from the dead, and become the firstfruits of them that slept."
This is not saying Jesus literally became all of the OT redeemed. The firstfruits are the them that slept, past tense. The OT redeemed are already made alive and physically waiting with physical Jesus in Paradise. They were the first in the order given next:
Each presented in their order:
Christ with the OT firstfruits. All those since Christ are still firstfruits for the last 1993 years.
Afterwards: those alive at His Second Coming, not any of the firstfruits. They were already presented. Those already physically gone, at the Second Coming, do not need to be made alive, out of Adam's dead flesh. Only those alive and remain on the earth in Adam's dead flesh, need to complete the process.
Then comes the end after he has made all creation subject. "The end" is predicated on the rest of the thought. "The end" is not the final word of "afterward they that are Christ's at his coming".
"Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power. For he must reign, till he hath put all enemies under his feet. The last enemy that shall be destroyed is death."
There is no indication that at the Second Coming, death is destroyed. In fact people are still dying in the process of the Second Coming. The Second Coming is not the thought of when the kingdom is handed back, or Paul would have written it that way.
Even in the Greek there is a break in thought between the coming and the end. The reason being is the continued thought: "For he must reign, till he hath put all enemies under his feet."
Reigning is not part of the
order of being made alive. Reigning is what happens from the beginning until the process is complete.
Adam's flesh being changed was the point Paul started out with, and reigning was the thought Paul ended with.
Even though Reigning is mentioned, it is not the Reigning that has an order nor does Reigning have a beginning and an end. That would be the wrong interpretation to say Christ stops reigning at the pronounced "end".
Your claim "the end", at the Second Coming, when, according to you, nothing exist is not handing back that which is made alive. That would be handing back nothing except a few redeemed souls still alive on the earth. That is not bringing the earth under subjection, but incinerating creation. What part of the finality of your own interpretation of 2 Peter 3 are you failing to see? The climactic final end of all existence being burned up, is not handing back a creation brought under subjection. That is literally handing back nothing, no creation at all. The total removal of all existence is not even implied in this verse: "and fire came down from God out of heaven, and devoured them." That is not implying nor stating all of creation is burned up. The "them" is referring to humans not creation.
The end pertains to the order of humanity being made alive. The order continues though, because at that point Paul introduces creation itself. Not only is Paul stating humanity is made alive, but creation itself. Incinerating creation is not making creation alive from Adam's disobedience.
"For since by man came death, by man came also the resurrection of the dead. For as in Adam all die, even so in Christ shall all be made alive. But every man in his own order."
This does not exclude creation. One must reconcile along with Paul, that all of creation is included not just mankind. That is why reigning is introduced.
"For he must reign, till he hath put all enemies under his feet. The last enemy that shall be destroyed is death. For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him. And
when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all."
This is not implying nor stating that destroying all of creation is the same thing as subduing all things. Removing death itself from creation is part of the order of reconciliation. This implies creation is restored not just humanity. Adam brought death into the world. Death is the last enemy to be removed. Removing creation from existence, the Amil explanation, is not making creation alive and removing death.
Creation is handed back in a made alive condition, with no death in creation period. Amil want us to accept creation is handed back in a dead state, totally destroyed. Death is the last enemy destroyed, not creation itself. Creation is not destroyed but subdued.
Genesis 1:28
"And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it:"
That is what it means to subdue creation. Not the Amil method of incineration. Jesus will have dominion over a perfect creation at the end. Not the Amil version where the end is the destruction by fire. Fire is part of the cleansing process like the water of Noah's day. The Flood was not over that first day it rained. It took months for the Flood to finish, and years of aftershocks. Creation will not be over the day of the cleansing fire. Creation will go on in a new heaven and earth fashion, until it is subdued according to Genesis 1:28.