Just write!
For me start is always the hardest part. Clear the house? Wash the dishes? A new book? A new tv show? Start is the uncomfortable. And this wouldn’t be different with writing. But the same way it happens with cleaning, washing, the book or the tv show after I start doing it I want to go until the end. The sensation of a completed tasks is always pleasurable. Well, not always when we finish a book or a tv show, however this is a topic for a different post.