Doesn't the Greek state it better? . . ."Jesus answered, "My kingdom is not of this world." (Jn 18:36)
I point this out because of Lk 11:20, Mt 12:28:
"But if it is by the finger of God (Holy Spirit) that I cast out demons, then the kingdom of God has come upon you."
It is here now, and has been since Jesus.
However, that kingdom of God is not an earthly (physical) kingdom (Jn 18:36). . .Jesus refused their earthly kingdom (Jn 6:15).
The temporal Messianic kingdom of God is a spiritual kingdom (Mt 3:2), within men (Lk 17:21),
set up in their hearts and consciences (Ro 14:17).
Its riches are spiritual (Ro 8:17), its powers are spiritual (2 Co 10:4), its glory is within (Ps 45:13, Zec 2:5).
We are now reigning with Christ (Eph 2:6) in his kingdom (Lk 22:69, Eph 1:19-22, Mk 14:62, 16:19, Ro 8:34, 1 Co 15:25, Col 3:1, Heb 1:3, 8:1, 10:12-13, 12:2, 1Pe 3:22, Rev 1:6, Ps 2:6 w/Heb 12:22)
The future kingdom is the eternal kingdom (Lk 21:25-28, 31), in the new heavens and new earth,
the home of righteousness (2Pe 3:13, Mt 5:5, 22:2, 25:1, Ro 4:13, Isa 65:17ff, 66:22, Rev 21:1-4, no death).
Just wanted to clarify the particulars. . .i.e., the kingdom of God is here now (Lk 11:20, Mt 12:8).