In your WordPress Visual Editor, you can select that text and click on the center or left or right align button to align your text.
As for layout of your site, I have seen some customers using this plugin https://wordpress.org/plugins/siteorigin-panels/ to layout their site. We never used it with our theme or test it with our products, therefore we cannot guarantee all our widgets will work with this plugin. But it’s good for using WordPress default text widget.
Please kindly note that we do not provide support for third party plugin.
Sorry, that’s all we can help on this issue.