Biblically speaking there are no people in heaven yet. That happens at the return of Christ.
1Ti 6:15 His appearing will be brought about at the right time by God, the blessed and only Ruler, the King of kings and the Lord of lords.
1Ti 6:16 He alone is immortal; he lives in the light that no one can approach. No one has ever seen him; no one can ever see him. To him be honor and eternal power! Amen.
Right now, as those verses tell us, only Jesus is immortal...only Jesus sits on a throne in heaven.
Speaking to Christians Paul says:
1Co 15:51 Behold, I tell you a mystery: We shall not all sleep, but we shall all be changed—
1Co 15:52 in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we shall be changed.
This occurs at the last trumpet, which heralds the return of Christ. He desribes it just a bit differently here:
1Th 4:16 For the Lord Himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first.
1Th 4:17 Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord.
The return of Christ is when Christians are resurrected to glory and enter the heavenly realm. Not before.
Paradise is empty today.
Upon death, the Spirit and the soul is raised to be in the presence of the Lord.
at the time of the Rapture our bodies are changed to receive a Glorified Body. 1 Corrinthians 15:51-57
2 Corinthians 5:8
King James Version
8 We are confident, I say, and willing rather to be absent from the body, and to be present with the Lord.
To be absent from the body is to be present with the Lord.