There are many free email platforms, but the most common seems to be gmail at this time. Creating a firstname.lastname@example.org email is very easy and fast. It creates professionalism as well as options for you to set up an auto-reply specifically for sanctuary as well as an email signature.
If you are planning on buying a website domain, you can also use it as part of your gmail account and create emails for other team members like email@example.com or general info@ or contact@ emails.
Google Workspace Admin Help | Connect your website to a domain registered through Google