There is no need to try to reinvent the wheel when it comes to resources for learning how to start and maintain a family history blog. GeneaBloggers is the best resource. They have A Genealogy Blog Primer with many helpful resources.
Each day they suggest a topic to write a blog post about which really helps. See Daily Blogging Themes.
If you register for a Twitter account and follow me, @savingstories, you will discover other twitterers who share family history related information and blog posts.
Most blogger use Word Press or Blogger.
Sample Family History Blogs:
Overcame By Grace using Blogger
Strong Branches using Blogger