To connect your domain to Gurucan you need to edit your domains DNS records.
We recommend doing that via Cloudflare.
We've got an article on that
If you'd like to move your root domain then you need to set these A-records:
@ to 126.96.36.199
www to 188.8.131.52
If you'd like to move your subdomain (subdomain.domain.com) then just:
subdomain to 184.108.40.206
Feel free to reach our technical support - we are always happy to help!
Read about adding SSL to your online school in our article.