If you want to act, and there are no acting jobs available, act anyway.
If you want to paint, but there are no galleries to purchase your canvasses, paint anyway.
If you want to write, and there are no publishers to publish your work, write anyway.
We are born to create and when we're young, we don't ask permission to sing, dance, write or build mud forts. We just do it. As we grow, all that changes, and we succumb to the fears of not breaking rules, of not standing out, and our art turns into mush.
You can change that. Write that novel, knowing that it may never see the light of day. Write it anyway. You want to publish it? Great! Get it published by someone who cares as much about it as you do. You don't need permission from anyone. In fact, it's your obligation to put your voice out there, to write, to speak, to act, dance and sing.
Does that frighten you? That's your lizard brain talking. There's nothing to fear. You may fail, but do it anyway. You may succeed too. Either way, your life will change for the better.