Scripture is clear that once we are born again we become slaves to Jesus and He becomes our master. It’s not a burden but a true delight to serve the King of glory.
We don’t obey God in order to go to heaven, we obey Him because he saved us and chose us before the foundation of the world and we serve Him because we delight to do it. We are made into a new creation.
If the only treasure you have in this life is chasing fame and money and materialistic things, than you found your heaven on this earth. If you die to self and surrender your life for Jesus in this life you will have Heaven in the next life.
Righteousness cannot come by the law, by our own efforts, our own abilities, or by anything that man may devise. It can only come by and through what Christ did for us at the cross and our faith in that finished work, which then guarantees the help of the Holy Spirit.
If salvation can be lost, than you have the power to remove yourself from Gods hands. We all sin nobody is perfect, we would lose our salvation each time we sin, God keeps His promises God is promise to keep us. Salvation is once saved forever saved.