It takes a lot of heart to write. It doesn't matter at which step you are at in your career. Your poor little beating organ is your best companion.
First, you choose a story close to your heart. You love its setting, its character, its plot. You research and build around your story. A ribcage to protect the heart, let it beat undisturbed. You plan, take a deep breath, sit down.
Pour your heart on the page. The words flowing with every beat, bleeding.
You end up with a mess. Take out your tools to clean it up. Dig to the heart of the story. Make it shine.
When it's ready you send your story out. You wait, your heart twisting and pounding. The answer comes and breaks your heart. Again and again.
Don't worry. Take heart. You have friends and family to support you. Never forget you are on their mind and in their hearts.
One day your story will touch an agent's heart, then a publisher's. They will put it to print and it will be picked by readers.
Others on this planet will read your words, torn from your heart. They will love it, and as they lay in bed at night, they will think of your story.
Follow your heart, and one day, they will hold your tale close to theirs.