Are you a more difficult creation or is the heaven? Allah constructed it.
He raised its ceiling and proportioned it.
And He darkened its night and extracted its brightness.
And after that He spread the earth
(Qur'an 79:27-30)
And He placed on the earth firmly set mountains over its surface, and He blessed it and determined therein its [creatures'] sustenance in four days without distinction - for [the information] of those who ask.
Then He directed Himself to the heaven while it was smoke and said to it and to the earth, "Come [into being], willingly or by compulsion." They said, "We have come willingly."
And He completed them as seven heavens within two days and inspired in each heaven its command. And We adorned the nearest heaven with lamps and as protection. That is the determination of the Exalted in Might, the Knowing.
(41:10-12)
Also, what does "ثُمَّ" (Thumma) mean? Islam sites like [this](
https://qurananswers.me/2013/12/22/six-days-of-creation/) claim - "thumma does not necessarily have a sequence and can be simultaneous and or moreover"