The reality of Heaven is as real as there is a Hell.
The ONLY pre-requite that licences you to become a citizen of Heaven is to BELIEVE & ACCEPT JESUS CHRIST AS YOUR SAVIOUR & LORD. Rejecting this FREE gift of God is the only sin that will send people to hell.
God's uttermost love for you was expressed in the finished work of Jesus' Cross at Calvary, where He paid for ALL your sins!
You DO NOT have to struggle to live a sinless life. Once you focus your attention on finding out what God has for you on this earth, and start going about to fulfil it by the power of the Holy Spirit, sin will never be an issue for you… and in addition, Mercy triumphs over judgement!