Dreaming that you are writing a blog means you have the desire to write, share your feelings in a public forum, or be more in touch with the up-and-comings of technology.
To dream of penning a blog and writing about the things you love is an indication of your passion for those subjects. Writing your opinions and sharing them may simply express your waking desire to let people know how you feel.
To simply learn about the blog, explore the steps and procedures for creating, maintaining, and sharing a blog means you're an early adapter and has quite an interest in new technologies.