From the website of the Southern United States diocese of the Coptic Orthodox Church, we read the following answer given by HG Bishop Youssef:
What does the word "predestination" mean in the Orthodox concept?
Everything comes from God, and everything should be drawn back to Him. But being predestined by God does not nullify human free will for in everything God is the originator and initiator; He wants us to be His children but it is up to us, to our choice by our own free will, to accept this invitation. Before the earth was formed, God the Sovereign determined that every sinner, by trusting in Christ would be made righteous. It will please Him greatly that we accept this invitation and this adoption through accepting His only Begotten Son.
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There are other questions in the Q&A regarding predestination which you can read
here.