The first resurrection is not their individual resurrection which happens later.
The first resurrection is Christ, the first fruits of those who have died, so it is His resurrection they take part in.
And the scene is in heaven, not on the earth, they reign with Christ today.
1 Cor 15 teaches on the resurrection
20 But now Christ is risen from the dead,
and has become the firstfruits of those who have [
d]fallen asleep.
21 For since by man
came death, by Man also
came the resurrection of the dead.
22 For as in Adam all die, even so in Christ all shall be made alive. 23 But each one in his own order: Christ the firstfruits, afterward those who are Christ’s at His coming.
24 Then
comes the end, when He delivers the kingdom to God the Father, when He puts an end to all rule and all authority and power. 25 For He must reign till He has put all enemies under His feet. 26 The last enemy
that will be destroyed
is death. 27 For “He has put all things under His feet.” But when He says “all things are put under
Him,”
it is evident that He who put all things under Him is excepted. 28 Now when all things are made subject to Him, then the Son Himself will also be subject to Him who put all things under Him, that God may be all in all.