Special teaching edition! What is the new covenant and why is it so important?

What is new covenant prophecy? Why does Paul say “woe to me if I do not preach the Gospel”? Is Hebrews 6 a warning about Christians falling away?

How am I supposed to store up my riches in Heaven? Do I need to give all my money away or give more to the church? Did Jesus die for all people or for all believers? Does the parable of the sower mean we can lose our salvation?

What did Jesus mean in Luke 14 when he said, “none of you can be My disciple who does not give up all his own possessions”? Does Romans 13 mean we have to obey the authorities no matter what? Is getting a tattoo a sin?