Yes, you can change it. On the side of you dashboard there is a button that says "Appearance" Click it and then click on themes. There are a bunch of themes you can choose from and if you want to, you can buy the CSS style sheet. You can also get themes that allow you to change the header! (the picture at the top) I hope I helped and good luck with your new blog!
If you make your blog using Wordpress then thay have many templates where you can customize the header and include your own images.
WordPress is actually a powerful web design app or blog maker .Just by adding some plug in you can customise your site/blog.
Most blog website (WordPress, Blogger, etc.) have a function that let you choose a site design. However, if you want a community that helps you create blog designs, they are not legions. Personnally, I know none, but there should be at least one on the net.
Search the web. There are many website with layout to download. If you're looking for a Wordpress design search for "Wordpress design template".
It is really difficult to give advice as to how to customize a blog without know what is the specific platform. Any platform should have some kind of documentation of how to use it and design it.
There are many sites on the internet where one can find background patterns for their blog design. Some of these sites include Pinterest, Blog Designs by Dani, WordPress, and Blogger Template Designer.
I suppose blog creation is something personal , but if you provide designs their are hell lot of companies that convert your design to word press theme , Its known as WordPress integration.Once you have your platform ready with your design integrated in WordPress , you can start up creating post / pages and categories. Some companies are listed in related links down under.
There are a number of ways, including services like Square Space. You can buy software like Adobe GoLive and get a hosting service and publish your own pages that way too. The easiest and quickest way is to get a free blog at a site like Wordpress and customize it to your needs as you learn.
WordPress URL is an online post identification address where site visitor can read the information from a post. In fact, WordPress Permanent URL Structure is not search engines friendly by default but you can customize it as search engines friendly. Go To Settings > Permalinks and set your own Search Engines friendly URL Structure to your blog site to get good WordPress URL structure.
The best WordPress themes for a blog site depends on the type of blog design you desire. There are several websites that can get you started. Try bestmagazinethemes.net or www.spiceupyourblog.com for ideas.
The term blog comes from the shorting of the phrase "web log". A blog is basically an online journal. You can write about just about anything. Some blogs are personal, while others are for businesses. Some free blogging platforms are Blogger, Wordpress, and Livejournal.
If it is on the WordPress blog you can. But, if you use it in other blogs, maybe some of them may be supported and some of them were not supported. Because I didn't try it before (Another Q: Does WordPress poll can be acted as HTML)