The default template for posts and pages aligns the page beautifully in the middle. But you can customize posts/pages easily via switches in the front matter to get a sidebar and/or to turn off meta-information at the end of the page like categories, tags and dates.
If your paper gets rejected …
… here’s (maybe) a little bit of consolation/perspective: In the “NIPS 2014 experiment”1, a tenth of the submitted papers (166) went through the review process twice independently (three reviewers and one area chair, respectively, dealing with it). Out of the 38 papers accepted by the first chair, 22 were rejected by the second. Similarly in the opposite direction. In other words (assuming uniform distribution of disagreement), more than half of the accepted papers (57%) would have been rejected if reviewed a second time.
advice for school administrators. Commun. ACM 58, 4 (Apr. 2015), 12-13.