You've stumbled across the penultimate questions that keep even the brightest minds of each generation wrapped up in arguments for decades. :)
The inexorable, purifying rhythm of the universe; birth, death, and rebirth. Everything goes through it. From the largest stars to the smallest forms of existence, all things come together, mature, and eventually wither and lose cohesion, spreading apart and becoming part of something else.
A bird flies high in the sky, but falls down to die in a field. The bird decomposes and becomes part of a tree that grows on the dirt where the bird died. The tree grows for a long time and eventually falls to the ground and decomposes, the bugs eat the tree that is partially made up of bug stuff before it, and other birds eat those bugs, those birds go on to live in places where there are people. At least one of those birds dies by a river and decomposes, parts of that bird are carried downriver where a person happens to be getting a sip of water. The person lives a long life, then dies and is buried. The worms eat the person, a bird eats the worm.
All life is interconnected. It is beautiful and terrifying at the same time. It is wonder and horror in the same breath. Just thinking about how deep life goes and about how broad life expands can take a creative mind and leave them breathless.
The final question of life is if there is anything after death. Physically there is, we eventually decay and become something else, but as for our consciousness, who knows? Religion claims there is an afterlife, but the only alleged evidence of that was 2 millennia ago, and stories change over time.
The only way to find out is to live and to die. There is no coming back and telling the secrets of the dead.
But while we are alive, the only thing that makes any sense is to live life to the fullest possible extent that we can make for ourselves. To go as far and a long as we can before we die, to live as happily as is possible and to leave behind a good legacy through the memories of other people who remember you fondly.
If you happen to ask "What is the meaning of life?", the answer very simply is this: the meaning of life is to give your own life meaning.
Always remember that you deserve the same chance at pursuing your happiness as anyone else. Never allow anyone or anything to stifle your will to live happily. Most importantly, never forget that you matter and you are not alone.