Most Christian believers will not enter heaven because they never followed Jesus. Faith without works is dead. Real faith in Jesus leads to action. Those who truly believe in Jesus obey Him, repent, stop sinning, live holy, are baptized in water and live according to His teachings, as also recorded in the gospels, Matthew, Mark, Luke and John. They seek to please Him and He gives His Holy Spirit in them to guide them into serving Him. They hear His voice and they follow Him. They are His sheep, His true disciples.
Do you just believe in Jesus or do you know His voice and follow Him? Have you become a disciple of Jesus Christ?
May Jesus bless you.