SEO Help

Hi folks,

I've launched a new business website. Built via Wordpress. What I don't have are the skills to do the back end techy SEO stuff. Can anyone point me in the right direction for someone able to do this? Or if any freelancers want a crack at it (paid obviously)? I'm not techy enough.

Below is stuff I've managed to do:

Google Analytics set up & Yoast plugin
MonsterInsights plugin.
Google Search Console - added sitemap
Image Alt Tags
URL & Meta Descriptions
Resized photos through image compression plugin
Keyword research
Internal linking and external linking of text content


Below is stuff I think I need to do:

Mobile S.E.O Optimization
Search Console/Webmaster Tools Optimization
Search Analytics Optimization
Breadcrumbs Optimization
Semantic Tags/S.E.O Optimization
Search Friendly URLs Optimization
Speed & Performance Optimization
Broken Links Fix

In particular, I need to resolve some responsiveness issues between different browsers and devices. For example, some title text and buttons are manually centred on the mobile through the padding/margin settings - there is no 'centre' setting. So on different devices they are positioning differently.