Are you comfortable purchasing from my website as a first-time visitor?
Would you please visit my website and tell me if you would feel comfortable or safe making a purchase on my website? My website is https://www.samsmotorsports.com.
If you had to change one thing on the website, what would you change?
No issues on my end with your site. As long as the https:// is in front of your URL you shouldn't have an issue with security. I'd increase the font size on your landing page where it describes your site info. The "welcome to Sam's auto..." section. Font that size and on a grey background normally as a Browser or Cookie disclaimer. Simply take your body and break it up.
"Welcome to Sam's Auto...!"
It's showing that your website is not safe. Why is it showing this message? It might not give a good impression.