After the story of Yeziat Mizraim and Har Sinai, as is well known, follow
the «boring parashot». Like a Netflix series that's in the middle of
the second season stops being exciting, goes halfway through the book
Shemot all the tension away. Har Sinai would have been a beautiful ending to the Sefer Shemot, but the Sefer Shemot continues
and describes in detail how the Mishkan must be built. The length of this guide extends to the end of the Book of Shemot, reaching a length over 10 times the length of Briat ha'Olam's description.
Why is the construction of the Mishkan described in such detail and why now and not later in the Sefer Wajikra where everything revolves around the Avodat Hashem in the Mishkan?
Rabbi Jonathan Sacks, the former Chief Rabbi of England, gives us the answer to this question in his book "LESSONS IN LEADERSHIP":
If you analyze the history of the Israelites from Yeziat Mizraim up to now, you will find that very often complaints were made on their part. Even before Kriyat Yam Suf many Jews wished to be back in Mizraim, later they complained about the lack of water, about the taste of the water, then about the lack of food and finally again about the lack of water. After Matan Torah there is even Chet ha'Egel. It's obvious what the problem is. Bnei Israel are too dependent. Until now, every crisis has been settled by Moshe and the Nissim. It was time for Bnei Israel to "grow up" and become creators and doers. Therefore, Hashem ordered Moshe to tell the people to build the Mishkan. This is the only way the people can learn to take responsibility and reach the next, higher level. Hashem calls us to take responsibility. Of course everything we have is from him, but what we do with it is up to us. A true leader does not work alone for the people, a true leader teaches the people how to work so that they can work for themselves.

This type of "leader" is still used today in many areas to achieve the best results. Also in the US Army with the special unit "Navy Seals". Jocko Willink was in this special unit for 20 years and wrote in his book "Extreme Ownership" how to lead a team responsibly. He writes: “The leaders must delegate the planning process along the chain of command to the lower echelons as much as possible. Team leaders within the larger team and frontline leaders (at the tactical level) must own their role within the overall plan and mission. Team involvement, even from the lowest level of staff, is critical to developing effective, innovative solutions to problems.”
The Dvar Torah's statement: Hashem did not create us and did not bring us out of Mizraim to depend solely on him. He brought us out of Mizraim to be His "partners in creation" (Shabbat 10a).