The best advice for someone who wants to start blogging is to write about what they know and what they love. That way, they can share their experience and knowledge, and they are more likely to last longer doing it because it's what they're interested in. That's why I'm surprised Elsa isn't blogging about being a queen and being able to do magic. But she probably loves fashion and make-up too, she just didn't have time to write about it when she was alone in her icy palace!