With the right plugins, you can optimize WordPress in 3 minutes. please excuse my utter lack of video skill, i didnt realize how hard it is to talk and work at the same time!
Here are the plugins:
All In One SEO Pack
Google XML Sitemaps
Related Posts by Category
UPDATE: heres another related posts that might work better
Contextual Related Posts
WP Easy Archives is no longer available. If it is, i cant find it.
Comment with questions and I’ll explain in more detail