Assuming you wish access your site via seanlaurence.com and www.seanlaurence.com, the configuration is not the same as the support guide you linked to.
Under Custom Records, you need to add an A record for the apex (seanlaurence.com) with a value of 75.2.60.5 and a CNAME record for the www subdomain (www.seanlaurence.com) with a value of zen-knuth-f2a02a.netlify.app.
If you haven’t already seen it, DreamHost does have a KB on adding DNS records
Thanks again for your help, Coel. I followed your advice and it worked. I believe I’m having a problem with the certificate now. I’m going to create a separate thread for that though.