Matthew 13: parables to explain the Kingdom of Heaven

In Matthew 13 we read many parables. Many of them begin with:

"the kingdom of heaven is like  ... "

If I were to complete this sentence, I would say that the kingdom of heaven is a place where the Lord's will is done, and therefore is a place of joy and peace.
But Jesus didn't say anything close to that. In fact, he did say something like that but in much more subtle way.
For instance:

45-46 “Or, God’s kingdom is like a jewel merchant on the hunt for exquisite pearls. Finding one that is flawless, he immediately sells everything and buys it.

I understand that the kingdom is like a group of people who found Jesus extremely important to his life, in fact, Jesus himself said that He is the life. If we think of the kingdom as a group of people with the same purpose, then we can say that the parables about the kingdom of heaven is talking about the church. The Church in fact is the place where the Lord's is done (through struggles) and where we find joy and peace (not as the world understands, but joy and peace in the middle of persecution and suffering.