Your wordpress theme looks good and is pretty well optimized. Take a a look at some of minor source code errors, specifically with calling for the roboto font.
Looks good and even though your wordpress theme is using Yoast SEO plugin, you have an opportunity to edit your page title tags to be more descriptive like:
</script><title>Home - Walt's Garage</title>
and think about adding on all pages a description tag :
<meta name="description" content="A page's description,
usually one or two sentences."/>
For the wordpress plugin you are using, here is a guide: https://yoast.com/meta-descriptions/ but keep in mind you can now go up to around 290 characters instead of the 155 listed.
Looks good and looks like a repairshopwebsites theme. They usually cover all the bases with their clients. I'm not a fan of the pages ending in .html, but that's what they do. With this type of "cookie-cutter" website (which is fine) it's important to customize text as much as possible or they allow.