What happens when we die?

I would describe the hereafter as a kind of paradise, very beautiful and harmonically. My imagination of the paradise be described like this: There isn’t any war, human being are happy and peaceful. Life there is like a warm and sunny spring day. All the flowers and trees are getting their lush colours. Leaves and buds open. When being there one should be able to communicate with those still alive. It should be possible to make the experience to be someone else, feel and live a complete different, exciting and new life. The life of someone one has always wanted to be. One should be able to speak understand all languages. I imagine that when J leave my dead body my spirit will feel on incredible freedom and fly.