This said, a point of clarification and then other summary points:
1) your looking to the 1000 year reign in parallel is on point.
The world of Revelation 21/22 is one where is there is NO SEAS, but a river flows from New Jerusalem to water the earth, much like in Eden there was no rain upon the earth, rather a mist went up from the earth, and rivers flowed from Eden. In a world with no more sea (Revelation 21) there will likewise be no rain.
2) the title from Genesis 1 to Genesis 2:4 of that creator(s) is plural "ELOHIM" in Hebrew and in English Transliteration "GOD".
In Genesis 2:5 and forward...the one creating the creation account of Genesis 2:4,5 forward is the SINGULAR title "THE LORD GOD" and in Hebrew the singular tense of ELOHIM. This is the same title given Christ in Revelation 22 "THE LORD GOD"...after he receives his throne (Revelation 21) he proclaims himself to be "GOD" to "HIM THAT OVERCOMETH" in the same chapter "He shall be my son and I shall be his God." BUt more importantly he proclaims "BEHOLD...I MAKE ALL THINGS NEW"...so we see a truth here...a cycle.
Now this said, pay closer attention to the scriptures of Genesis chapter 2...THE LORD GOD does not plant a garden and THEN PUT ADAM INTO IT as you sumise! NOT AT ALL!
In Genesis 1 thru 2:4...the TREES, the FRUIT...the HERB of the field...was all CALLED FORTH...FROM THE EARTH! IT SPRUNG FORTH at the command of "GOD"... the plural Elohim (Family) of God...and it did so on DAY 4. 2 days before the creation of mankind. IN this account even the plants are a different creation! NOTE Gen 1:11,12 not only are the plants and trees and fruit SUMMONED TO SPRING FORTH FROM THE EARTH...but EVEN THE SEEDS...."THE SEEDS" are commanded to spring up from the earth! THE EARTH PRODUCES THE PLANTS...FRUIT TREES, FRUIT...and even the SEEDS!
So the seeds in Genesis 1 COME "FROM" the earth.
In Genesis chapter 2...THEY ARE PLANTED INTO THE EARTH! and the plants in Genesis 2...are not sprung from the earth, they are created independent of the earth like potted plants, and then transplanted INTO The earth...note the passage of Genesis 2:4b,5a
"4b)...in the Day that The LORD GOD made the earth and the heavens,
5a) and every plant of the field BEFORE IT WAS IN THE EARTH,and every herb of the field BEFORE IT GREW,
Now take note that Gen 2:8 notes "...and The LORD GOD PLANTED A GARDEN eastward in Eden"
And your surmisal of "GOD" placing Adam in the garden, while it may seem like splitting hairs, I assure you, it is not...there is a very important truth hidden in plain sight here...one your Spirit already testifies when prompting the question to ponder if this situation is like that where a place is being prepared for us in advance for the 1000 year reign! The full answer to that question rests in Zecheriah 14, and in Revelation 21 and can is further addressed in a Study on this board titled 'A CITY COMING DOWN."
But for now, note it is the singular entity..."THE LORD GOD" who both creates and then places "ADAM" in the garden, and I assure you...this has every bit as much to do "WITH THE END" as it does "WITH THE BEGINNING!"
So...getting back to the plants of the garden...note These plants were created every plant of the field..."BEFORE IT WAS IN THE EARTH" like potted plants...every herb, every plant...not seeds, plants, herbs CREATED BEFORE they were in the earth...then planted into the earth...so even the manner in which plant life is created in the Genesis 2 account, is obvious by comparison a very different event than that of its counterparts of Genesis chapter 1, as are the humans!
Here are the accompanying charts I made to go along with this study: