When I started blogging (not long ago) I really didn't know where to start from. There were three options - WordPress, Blogger or some smaller platform like Wix or Jimdo. I was really interested in what Ghost can offer, but we will have to wait a few more months before it comes out. Most friends suggested WordPress, because it is a lot easier, prettier and it's the biggest blogging platform around, but I preferred Blogger (Blogspot). Sometimes I regret my decision, but the whole experience is really fun.
When you are new to the platform you really don't know what to do first. Start with choosing the right name. Think a lot about that. There is no turning back (you can make a new one, of course). But if you are making a blog, you probably already know what you'll be writing about. If you have the resources - buy a domain. It is always the better choice. This way you have more options, more features and you can more easily promote your site.
I know my blog is not the best example for beauty and style, but you might be more talented, might be more innovative and you could do a better use from the guides I'll share with you. When I started I had all these questions and had to browse for hours to find the answers. So I'll give you the articles which helped me most.