Jesus was a human being created by Allah with out a father just like Adam who was a human being created by Allah with out parents.
Jesus is not God nor son of God, but he was a great messenger from God to guide people to worship and obey God.
Worshipping any one apart from God is a major sin.
Jannah (Paradise) is not under our control to judge who will enter in it or not. Allah, The Glorious, Knows who will be granted Paradise because He only Knows everything about everyone from His creatures and grants Paradise according to His full Knowledge and Mercy.