I have been told by believers about some vague descriptions of Heaven and Hell, and that they are working very, very hard to get into one and to stay out of the other.
Believers in what? I have never tried to get into heaven. That is religion. I have faith in the One that came to be our righteousness, therefore I will enter His kingdom through grace, through faith. The works we do naturally flow from that faith, as a spring naturally provides water.
Describing heaven, we are limited to descriptions from the bible. But I imagine that it's a little bit like the earth in a none-polluted form. What matters most is what the scriptures say, that is is a place of joy and peace in the Holy Spirit.
Anyone who has experienced the presence of the Holy Spirit, the only way to describe that is that everything you have ever heard, all the best arguments, all the things of men, and all the BS, just does not matter. You absolutely know, through revelation, that you have experienced something far more beautiful, far more precious, than anything the crumby world of man and his sin, could offer.
But alas, men preferred darkness, rather than light - and how can the darkness comprehend the light? It can't.