A 'blog' is an acronym for the term weblog which is the term for a is a web-based diary in which individuals can post their views and feelings on the Internet. Absolutely anyone can create and maintain a blog. It's simple and, in most cases, free.
Firstly, look for a good blogging provider which you like. Once you register as a user, you will have at your fingers a plethora of templates ready for your use which you can even personalize to suit your requirements. Provide details like your user name, interests, pictures etc. There are loads of other features to choose from, like blog chalks, tagboards, guestbooks etc.
Then, determine if you would like you blog to be personal or private in nature. According to this, you can modify your settings. Try out a look and a style for your blog and work with it for a few days. Make whatever changes you wish to, and you can maintain your blog over a period of time