You have chosen your domain name and your hosting company (and they may well be one and the same). The next part of your journey in “getting started with your blog” is to install WordPress. It may be that you have decided to have your blog hosted on a “blogging platform”, like Blogger.com or WordPress.com. If you are happy to go down that road, great. I have a blog on both these platforms and they serve their purpose well. But for the majority of users involved in web marketing, or trying to get an online presence for their business – whatever it is – you will be installing WordPress on your own domain.