The two greatest comments are these:
1. Love the Lord your God with your whole heart, soul, mind, and strength.
2. Love your neighbor as yourself.
Jesus summed up the entire Law of God with those two directives being the greatest.
Jesus Christ is the only way to God, the Father. You must believe that He is the Son of God, confess that belief, repent of your sins, be baptized for the remission of your sins, and walk faithfully in his commandments unto death.
Jesus Christ will come again with the heavenly host to destroy this world, create the new heaven and new earth, and usher in the new age. All the dead will be raised. We will all see this event. We will all, every human being who has ever existed, will bow the knee to Jesus Christ and confess Him as Lord and King. Those who have followed him will be raised to life eternal. Those who have not followed him will be thrown into the Lake of Fire prepared for the devil and his angels. The saved of God will live in his presence for all eternity singing his praises and worshiping him forever.
I don’t know every minute detail about Christianity. But I know that much. You’ve got to try as best you can to follow his Word, trust in God, and his promises. You must keep his commandments because doing so proves that you love him. You must put off the old self with its carnal desires and put on the new self (i.e., be “born again”) and make your life focus learning to walk in the Spirit of God.