Thank you for your help. I added an image to the blog post, but it shows up underneath the category/title. And so now the structure on the main page looks like (with_image_added_to_blogpost.jpg) :
Thumbnail
Category/Title
Image
Words
The structure of the individual blog post is the same, but without the thumbnail image.
For the structure of my blog, on both the main blog page (which is my home page) and individual post, I want it to be (what_I_want_it_to_look_like.jpg) :
Image
Category/Title
Words
It will not let me add an image block above my Category/Title when I edit the blog post. This is why I used the thumbnail as the main image for the blog. But as you can see in (currently_thumbnail.jpg) the thumbnail is cropped in from the top and bottom. And because I'm using only the thumbnail image, it doesn't show on my individual post, so they look blank.
I've looked around and googled, but I'm not seeing where I can edit and adjust settings of the thumbnail crop.
Again, thank you so much for your help, and sorry if I'm not quite understanding something.