It doesn't have to have a point exactly... I think it's more what happens between when you become fully aware you won't live forever and before you realise you've lived a good life and are are not afraid of dying. I think it's mostly making good and bad decisions, being happy and sad, going through love and heartbreak, hating and loving, experiencing life to its fullest and sleeping till noon. It's about working, changing jobs, studying, exploring, travelling, meeting people that you like and meeting people that you want to forget. It's about hobbies, what makes you happy, what gets you going etc. Amazing food, fantastic cultures, great places to visit, trying new things that get you out of your comfort zone.
Life isn't always great. We have to work hard, we have to spend years and money on studying, we have to work hard and wait for weekend and some time off but if everything was easy then life would be boring.
It's about finding out who you really are and what you like and what you want from life. It might come to you when you're 17, it might come to you when you're 25 or it might come to you when you're 50.
Just live every day.