Pick something you will enjoy. For your first book, try to find a story you already know, like a book you've read before or a movie you've seen. You can also listen to an audiobook while you read, which will help you read faster and understand how the language sounds.
Audiobooks also let you focus on the story instead of trying to understand every single word. You don't always need to know what every word means. When you read books, you can ignore the words you don't know and just enjoy the st