2) Build up a life skill first so you can make at least modest living yourself without spend too much time, so you have your time to think and write. Follow Baruch Spinoza, Franz Kafka, even Hegel (he was a high school teacher for a while) examples.
You may elect not to have a family, because it would be a undue burden for you.
3) Don't give up your intellectual and spiritual searching, and stay in touch with a few friends, teachers who appreciate your work and thinking.
Don't expect many people to understand (or appreciate)you, but you will still have a few friends or teachers who do.
You are still to young, so you can chose to be more down to earth like many people adviced here. It is not a bad idea either.