Flower,
I went through the exact same thought process you are going through. I'm still searching for answers. As long as you are alive you'll be searching for answers. The thing is.... there are many answers that we won't have in our lifetime. Is there life on other planets? Can we duplicate the human mind? Why do kids refuse to listen to good advice? I'm sure you will find many more.
Basically Flower, you have just been born. You have just begun to think for yourself. You have just fallen out of the nest. It's a little scary right now. Now you have to realize that you are going to have to do it on your own. Of course, it helps to bounce your questions and ideas off other people but the decision is yours. Just as the consequences are yours.
When it comes to morals/ethics, again you have to decide for yourself what is right and wrong. You may find that your morals/ethics come very close to some religions. That doesn't mean that you have to join that religion. It just means that your thoughts are similar to the founder of that religion. Whether it was an individual or a society.
Same is true when it comes to the purpose of life. You have to set your own personal goals. You have to decide your own purpose. That doesn't mean you should go through life with no purpose. Decide....Adjust.....but live life with purpose. Even if that purpose is to have fun.
You can get some ideas from literature, philosophy and religion but I feel like the best ideas come from discussions with normal people like you and me. Keep asking questions even when you think you know the answers.
Good luck
TimB
The harder you work.....The luckier you get.