This should give you a little taste for it. According to Jesus (and He should know since He created it):
42 “But whoever causes one of these little ones who believe in Me to stumble, it would be better for him if a millstone were hung around his neck, and he were thrown into the sea. 43 If your hand causes you to sin, cut it off. It is better for you to enter into life maimed, rather than having two hands, to go to hell, into the fire that shall never be quenched—44 where
‘Their worm does not die
And the fire is not quenched.’
45 And if your foot causes you to sin, cut it off. It is better for you to enter life lame, rather than having two feet, to be cast into hell, into the fire that shall never be quenched—46 where
‘Their worm does not die
And the fire is not quenched.’
47 And if your eye causes you to sin, pluck it out. It is better for you to enter the kingdom of God with one eye, rather than having two eyes, to be cast into hell fire—48 where
‘Their worm does not die
And the fire is not quenched.’
[The New King James Version (Mk 9:42–48). (1982). Thomas Nelson.]
Big take-away's... you never die, and the fire is never quenched. You don't want to go there, you can trust Jesus on that one.