I see that you are using blogger. Most important benefit of blogging with these type of freebies is that, they are very easy to use and of course free.
The other benefits of Free Blogging Platform are:
2. Reliable Hosting
3. Almost Unhackable
4. Owned by Google
But it has also some disadvantages as:
1. Blogger Owns Your Blog Site
2. Blogger Lacks Plugins
3. Limited Template For Your Blog Site
Now, you see, blogger Limited Template for your blog site. That means you need to either develop your own xml template or you need to stay on the limitation. So, Choice is yours which to choose.
Since, you are newbie on blogger, recently you can continuing your blogging with the custom designs. But as your traffic increases on your site, you can create your new design and host own custom domain. So, you can redirect the people from blogger to your own custom domain having custom design as your wish.