Website Seo

I own 2 small taxi companies and I built the websites myself with a website builder. I also use adwords but I'm trying to improve my organic rankings. What I do know about seo has been self taught but I really need help with the back end of my website, i.e. HTML structure, metatags...etc. There's a lot that I already know, so what I'm looking for is an expert to consult with about the stuff I don't know. I don't want you to do it for me, I want you to teach me how to do it myself via screensharing the back end of my site and showing me what I need to fix in order for my site to robot friendly. Is this something you can help me with?