Why should we care about Jesus Christ?

At the end, when you pass away, the only thing that will matter then will be either going to heaven (kingdom of god) or going to hell. This is assuming that the bible is true. But, in order to enter the kingdom of god one would need to submit to jesus christ and therefore what is written in the bible. That is, to not sin and pursue a relationship with jesus. But why I ask? Is the effort worthwhile? Or to put it into another perspective, is it really important that we not sin and hope that we are able to enter god's kingdom in the afterlife? I guess it depends on the person if that seems like a good idea, living in some kind of eternal bliss, then sure the effort spent will all be worthwhile. However, what if you don't really care if you enter hell or heaven. What if you don't feel afraid with the concept of hell or you don't feel amazed by heaven's perfection. Would you feel the same way with Jesus and not really care if this person saved us but what exactly did he save us from? Sin? So that we can enter his kingdom? Do we even care about that? I think the problem with the bible and for jesus as well is that there is too much emphasis on sin when, when you think about it, is just another term for rebellion. For me, what I currently care about most is how to have a fulfilling life in this world. Fulfilling. Enriching. The feeling you get when you feel that you are actually living. To downplay the teachings of the bible I think it is just another set of laws that does its best to govern the way we are ought to behave. Thank you for your suggestions Jesus but no thank you. Kingdom or no kingdom, I think I will live my own life. I don't need some person telling me what is right and wrong. I want to live an authentic life. Not contrived.