How to create a preview on a blog?

Hello,

My blog is jeffreybuskey.com. Under my blog section, I have posts. Right now the blog post are in full length, then another blog appears, all the way down the page.

I only want to show a brief snippet of each blog or have the ability to provide a “more” label to expand the section to read the entire blog. If there is a better way to do this, I am open to your suggestions. What would be really nice is to be able to show a picture of each blog with a snippet of text below the picture. Does any one know how to do that?

Thank you for your help,
jeff