Peter is talking about how the scoffers of today and tomorrow think everything in creation has stayed the same and therefore they do not believe that Jesus will return. That they are willingly ignorant of the fact that God created the creation and how the world was destroyed by the Flood in Noah's time. Indeed this verse is very foretelling of the OEC and other heresies of our time which are basically premised upon denying the creation account in Genesis and the Flood account.
Peter goes on to use the Noahic Flood reference to foreshadow the end of time when the creation shall be destroyed by fire. This is another chapter where it is good to read the whole chapter and is actually pretty straight forward.
2 Peter 3
1 This second epistle, beloved, I now write unto you; in both which I stir up your pure minds by way of remembrance:
[SUP]2 [/SUP]That ye may be mindful of the words which were spoken before by the holy prophets, and of the commandment of us the apostles of the Lord and Saviour:
[SUP]3 [/SUP]Knowing this first, that there shall come in the last days scoffers, walking after their own lusts,
[SUP]4 [/SUP]And saying, Where is the promise of his coming? for since the fathers fell asleep, all things continue as they were from the beginning of the creation.
[SUP]5 [/SUP]For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:
[SUP]6 [/SUP]Whereby the world that then was, being overflowed with water, perished:
[SUP]7 [/SUP]But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.
[SUP]8 [/SUP]But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.
[SUP]9 [/SUP]The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
[SUP]10 [/SUP]But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
[SUP]11 [/SUP]Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness,
[SUP]12 [/SUP]Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?
[SUP]13 [/SUP]Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness.
[SUP]14 [/SUP]Wherefore, beloved, seeing that ye look for such things, be diligent that ye may be found of him in peace, without spot, and blameless.
[SUP]15 [/SUP]And account that the longsuffering of our Lord is salvation; even as our beloved brother Paul also according to the wisdom given unto him hath written unto you;
[SUP]16 [/SUP]As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.
[SUP]17 [/SUP]Ye therefore, beloved, seeing ye know these things before, beware lest ye also, being led away with the error of the wicked, fall from your own stedfastness.
[SUP]18 [/SUP]But grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. To him be glory both now and for ever. Amen.
You have it right, sticking to what those scriptures tell. Not considering verses 6 & 7 properly replaces Noah's flood with a "Satan's flood" that the Bible doesn't describe. God simply started this planet off with no dry land, initially covered with water. There is nothing in scriptures that hints of a judgment on a world that was before Genesis 1:2. The "gap theory" was a cowardly compromise of some theologians trying to deal with newly emerging evolution theory.
Verse 7 describes Peter's world, post flood. This present world he shared with us replaced the pre-flood world Noah knew in his youth, the same earth Adam lived in. That old world was of the creation week, which was judged with water. Listing verses 1-6 alone to establish the "timing" leads to error. This second earth will be judged by fire in the future.
Indeed we are of this second world, to be replaced by a whole new world order, the New Earth Isaiah told of to come. That will be the eternal earth which will never see judgment or a curse.
Genesis 1:1 is a preamble, an opening statement, an introduction, followed by details that begin with verse 2. Taking it as evidence of a whole other creation before verse 2 is as much error as taking chapter 1 as a different creation than presented in chapter 2, which also has a preamble, in verses 1-3, followed by more creation details concerning man.
The whole distortion has been for centuries a concerted effort to eliminate the reality of significant judgment from God. Men resisted that in ancient times, on into Peter's time, and in our time, right up until the last day of this world. The result is a deliberate denial of the flood of Noah's day, and of the judgment to come. That flood is real, and ought not be distorted by crediting the rebellion of Satan and his angelic followers. We don't know when that happened, but assume times. It might have happened the day Satan deceived Eve.