DNS settings to point domain to Substack

I would like to have my domain send traffic to my substack page, instead of my current website.  Substack says:

But when I navigate to the Domain Center on the control panel, it doesn't seem to give me options that will work. Is there a page or thread that will walk me through it? If I click on Advanced DNS Options it says, "Sorry, you cannot edit your advanced DNS settings for this domain because you have altered your default nameservers. If you wish to edit your advanced DNS settings, please reset your nameservers to the default Homestead nameservers first."

Do I have to switch it back to the default before I can edit the DNS settings?

Thanks,

Richard