Okay clear something up for me. Your god already knows who's getting eternal life right? So why would there be a second resurrection when he already knows who would make it that time too? Why not just take them in the first one? It's not like god can't make a "bus" long enough to tote them along too.....
God can choose to know or not know. God can use his foreknowledge when necessary such as in Noah's day. But because all are created as free moral agents then God chooses to let the choice be ours.
Please notice that those with a heavenly calling at Hebrews 6vs4-6 do not have that calling carved in stone, so to speak. They can fall away.
Those that commit the unforgivable sin do that against God's will. Matt 12v32.
God desires none to perish or be destroyed but repent. 2 Peter 3v9 B.
Except for those few miracles, there is no second resurrection mentioned in Scripture for general mankind.
The first or earlier resurrection is for those ruling with Jesus- Rev 5vs9,10.
Following the first or earlier resurrection to heaven will being the earthly resurrection taking place on earth during Jesus 1000-year reign over earth.
-Daniel 12vs2,13
The people on earth will be earthly subjects of God's kingdom rule.
Those in heaven have two jobs to do.:They serve as kings and priests.
As kings to take care of governmental responsibilities of subjects on earth.
As priests to take care of spiritual duties towards earth's subjects or citizens.
All this starts at the time of Jesus involvement into mankind's affairs described at Matt 25vs31,32.
The living people separated to Jesus right hand of favor, so to speak, can remain alive and keep right on living right into the start of Jesus peaceful millennial reign over earth without dying when Jesus ushers in Peace on Earth toward men of goodwill. They will be there to welcome back the earthly resurrected ones with the prospect of everlasting life on a paradisaic earth.