How can I edit my posts in wordpress

Hi everyone I have a site with www. in front of How can I edit my postings will appear as shown in the example Example: with http:// in front of The four pictures with read more I have 10 posts on the site I want to change them to look like in the example I do not know if anyone knows how can I do that is pretty hard Thank you

Please elaborate your question and I am sure someone will answer.

Do you mean a site header with a fixed-width 3 column layout?

If so, I guess you could look for themes that have that, or try modifying the one you’re using.