Not sure if a site’s legit? One quick way to check is Google’s Safe Browsing tool:
https://transparencyreport.google.com/safe-browsing/search
It doesn’t catch everything, but if you see “This site is unsafe” then definitely beware.
P.S. If your site is ever incorrectly flagged as unsafe, you can report it at Report a Page to Google Safe Browsing. After Google verifies the safety of your site, they’ll update your site’s status.