First a person must seek God. He must be longing for something better – for righteousness. James 4:8 (NKJV), “Draw near to God and He will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double-minded.”
A person recognizes his sinful condition and repents. He learns Jesus died for him and he accepts Jesus. Ephesians 1:13 (NKJV), “In Him (Christ) you also trusted, after you heard the word of truth, the gospel of your salvation; in whom also,… believed,…” That person becomes one in the household of faith. (Galatians 6:10)
During this present age (before Christ establishes His kingdom on Earth), God may choose to call him with a heavenly calling (Matthew 22:14; Hebrews 3:1) by sacrifice. Romans 12:1 (KJV), “I beseech you therefore, brethren (?believers?), by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.” As Jesus said, “… If any man will come after me, let him deny himself, and take up his cross, and follow me.” Matthew 16:24.
If a person does give his heart to God, that one should receive water baptism. Acts 22:16 (NKJV), “And now why are you waiting? Arise and be baptized, and wash away your sins, calling on the name of the Lord.”
Salvation from the death sentence pronounced on Adam occurs if God accepts your consecration. At that point He begets a new life in you with the Holy Spirit. This sacrificial life, the denial of self-will to do God’s will, is only possible for new creatures with the transforming help of the Holy Spirit. John 6:63 (Weymouth), “It is the spirit which gives Life. The flesh confers no benefit whatever. The words I have spoken to you are spirit and are Life.”
The faithful receive a heavenly resurrection and reign with Christ. Revelation 17:14, “… he (?Jesus?) is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful.”
After Armageddon, Jesus will resurrect the rest of the world (John 5:28) and establish His peaceable kingdom. 1 Corinthians 15:22-26 (RSV), 22 “For as in Adam all die, so also in Christ shall all be made alive. 23 But each in his own order: Christ (Jesus and His Church) the first fruits, then at his coming those who belong to Christ (those who will learn to love righteousness and regain human perfection). 24 Then comes the end, when he delivers the kingdom to God the Father after destroying every rule and every authority and power. 25 For he must reign until he has put all his enemies under his feet. 26 The last enemy to be destroyed is death.”