You won't have many dreams in your lifetime. Some people might never discover their dream. Do it now.
Don't wait until the day you're more established, until you're richer, until you're better. That day never comes. Other things get in the way.
You have responsibilities yes, and you need to make sure you don't place yourself in a dangerous financial situation. You can look after yourself and still pursue your dream.
When you look back at this moment, a decade from now, who will you be?
Be the person who follows their dreams.