I am all alone, I want to get adopted, Im just 19.

What is your general location in the world? Here in the western part of the globe we know that no one adopts a grown man and he is expected to feed, clothe, and provide for himself. Who does that for you now?

Most people want to adopt babies, some young children. At 19 you are an adult. Adult adoptions are very rare and done only under certain circumstances!

As noted, adoption is generally for young children. Adult adoptions generally occur in step child situations. Adoption will not work for you. You need to look at different alternatives.