John Piper once presented eight similarities between the adoptive grace of God the Father in the gospel, and the adoption of children into a Christian family. Those are: 1) Adoption is costly. 2) It involves the legal status of a child. 3) It creates a spirit of sonship. 4) It involves moral transformation by the Spirit of God. 5) Adoption makes us heirs of the father. 6) It requires serious planning. 7) It arises from very bad situations 8) It means that the adoptive parents will suffer now and experience glory later.
How beautifully and well these state the realities of the situation! May God give you much grace if your family has made the gracious choice to adopt. These books have helped many who are in your shoes.