Bueno theme: center logo

I am very new to this and would appreciate all the help i can get! I don’t know very much CSS, so step-by-step instructions would be appreciated.

1. I am trying to center my logo image, but can’t seem to figure out how to do it. What custom CSS should I add to do that?

2. At the bottom of each post, there is a category, author, and comment section. How do I add in an additional section for the date that is syled the same? I know there’s a date tag on the side, but I’d like to have an additional section for the date that shows the year of the post.

3. How do I add some extra padding/top margin between my side widget “elsewhere” and the social media icons beneath? I am using a widget for the icons, so I can’t really go in and change the css to add padding.

Thank you in advance!