is heaven the afterlife or is it found through service and prayer?

A lot of Christians hate Catholicism but if you don't have the Virgin Mary it's like Christianity lite

Heaven is the afterlife, nothing wrong with service and prayer though

Luke 18:27-28 As Jesus was saying these things, a woman in the crowd raised her voice and said, “Blessed is the womb that bore You, and blessed are the breasts that nursed You!” But He replied, “Blessed rather are those who hear the word of God and obey it.

any orthodox fam itt?