Write with the heart, edit with the head
“A journey of a thousand miles starts with one step.” – Ancient proverb.
Some people write endless notes before they start on their novel. Some write notes, then more notes, and never get started. Or they get an idea. Or several ideas. And never get started.
What I say this: just start writing. Don’t worry about a detailed synopsis, or voluminous character notes, or world building. Just write. Write with your heart. With your guts. Don’t let anyone tell you what to do. Be a rebel.
Once you’ve done the first draft, you can then start editing. With your head (as well as your heart of course).