Thank you for these links. I do need to use a specific Adobe font however, because we do want some of the headings to exactly match the branding we've created for this client. I've actually checked out this post from Kate Scott and if you see under her Adobe Typekit instructions, she says to copy and paste the Adobe project ID to the External API Keys labeled "Adobe" under advanced settings in SS. This API Key doesn't seem to exist anymore.
So you can see I've hit a wall here. Have you uploaded an Adobe font using these guides? I'd love to know how you got around this wall concerning the External API Key. Thank you!