Jesus never said that his followers would *go* to “Heaven” per se. He repeatedly indicated that the “Kingdom of Heaven” would *come* to them. To me, that seems like a pretty big difference. As far as I can ascertain from my reading, Heaven itself is a realm reserved strictly for God and His angels. Jesus said that no one has ever ascended there. (John 3:13) I suppose he would later become the first, if not the only, exception. (Elijah is disputable. 2 Kings:2)
The purpose of life is to live it being self-aware in the eternal now with its infinite versions of us. It is about living our dreams, and not just dreaming about living them one day.