Hi janelle,
for your question 1>
==> You need to add the images at featured image of your particular post. Then the image will be pulled over.
for your question 2>
==> We don’t have any widgets for the blog posts. We just have only 3 template for the blog page. They are blog image large, blog image medium and blog full content.
Our default content is blog image full. You just need to create a page and at the right side of the page below update there is template with drop down. Which template you want to assign. Select the Template. Then create a post Then it will display according to the template.
Hope this may help you
Thank you!