As to the first Adam and the last Adam, consider the comparisons (and contrasts) between Gen 1-3 and Rev 20-22:

GENESIS 1-3 REVELATION 20-22
A river watering the Garden (Gen 2:10-14)… A river watering the Garden (Rev 22:1,2)
A companion made for the first Adam (Gen 2:18-25)… A companion made for the “last Adam” (Rev 21:9,10)
Paradise lost (Gen 3:23)… Paradise restored (Rev 21:25)
Tree of life lost (Gen 3:22)… Tree of life regained (Rev 22:1)
Leaves for a covering, but to no avail (Gen 3:7)… Leaves for healing (Rev 22:2)
Curse imposed (Gen 3:17)… Curse removed (Rev 22:3)
Sorrow and death (Gen 3:16-19)… “No more death or mourning or crying or pain” (Rev 21:4)
Man’s dominion (Gen 1:28) broken (Gen 3:19)… Man’s dominion restored (Rev 22:5)
Serpent triumphant (Gen 3:13)… Serpent bound (Rev 20:2,3), and then destroyed (v 10)
Adam and Eve separated from the presence of God (Gen 3:24)… God dwells with man again (Rev 21:22,23; 22:3,4)
Heaven and earth separated (Gen 1:6)… Heaven and earth brought together (Rev 21:1,2)