There’s a lot of writing advice out there. Following some guidelines, such as the ones in my post about dialog attribution might make your writing more pleasant to read, but don’t let writing advice bog you down.
Things can be fixed later. There’s no need to wait until your idea is perfect, or until you’ve mastered all the conflicting writing advice in the world. If you try, you’ll never write another word. You can revise your rough draft, and even then, a book is not a perfect thing.
The true goal of writing is to tell a story, not to be perfect or even amazing. Sure, having your writing considered great would be nice, but the ultimate purpose of writing fiction for an audience is to tell a story. Starting may be a struggle. You might be uncertain of what you want to write, and there may be a voice inside your mind telling you that this won’t work or that that sentence you just wrote is bad. You might feel like you have no idea what you’re doing. That’s okay. It doesn’t matter. Just keep writing. Write until the end of the story you are telling. Write until the end. You can and should take breaks to eat, sleep, and do other things, but do not neglect your story until you’ve reached the end. (You can write the actual words “the end” and then remove them later, or just say them out loud while you save your document.)
So here’s my advice for today. Get your favorite pen or keyboard, find a good place to work, and start to write. In the words of NaNoWriMo, “the world needs your story.”