one post on the homepage

I love this theme for one, but I’ve encountered a problem.

Currently I have a static homepage which I’ve selecting in WP->Settings->Reading

I would like a post because it has a white background, as well as the Criteria Rating option.

When you set posts on the homepage, it only shows an excerpt and a link to read more, is there any option to show the whole entire post?  Or add the rating thing to creating Pages too

Thanks!