Hello Daniel,
As a Christian believer who has been avid in scriptures, who doesn’t know everything single thing about the Bible. Will tell you this, I am someone who believes Jesus, returned to gather His Bride that was to be waiting for his return back then in that age before the destruction of Jerusalem took place on 70Ad.
These types of subjects can go for periods of hundreds of hours just doing a Bible study along with the including of looking and using the Old Tedtsment to help intercept and lay out the New, Testsment by and through the spirit, which many of the previous Old Prophets, and the Disciples of Christ have laid openly for anyone to see in the now collected Bible one uses for themselves today.
A simple answer to your question:
IF you say you are saved , how do you know you will be RESURRECTED ?
A person will experience new resurrected life by the given by God which God gives Holy Spirit and the Spirit of Christ, to dwell within your heart. That person will have new desires to seek out the things of God and will hold on to the truth and hope founded in the Gospel of Christ. That is Jesus proclaims resurrection for the believers and unbelievers. That is a promise.
The revelation says there will be a separation of believers and unbelievers in Revelation 22, and that is also a promise, they however are outside the heavenly gates of the city, however the gates to the city are never considered or said to be closing those who outside completely off.
Thank you for a moment of your time, and reading,
In love, peace, kindness, faithfulness of Christ,
Matthew Gallagher