mailchimp as an alternative to feedburner emails

When google turned off feedburner emails, I just removed the "subscribe to emails" link. The other day, I happened to come across this link, 
https://cascadevalleydesigns.com/moving-subscribers-away-from-feedburner-and-into-mailchimp-updated-guide/

So, I'm trying out this on another blog. 

Some points to note:

• After logging in to feedburner, we can download the list of email subscribers as csv from the "three vertical dots" menu.
• We can import this with or without editing into mailchimp contacts.
• Mailchimp free account has a footer with mailchimp logo etc.
• I tried to customize my feed by choosing the rss feed to be
  myblogname.blogspot.com/feeds/posts/default?updated-min=2022-11-14T00:00:00
  because my latest posts there are dated 1992. If we choose the default feed, the 1992 posts are not shown, only 2022, 2021 etc are shown. 
• We can preview RSS feeds using online tools like RSS Feed Viewer
• As mentioned in the howto post at the top of this email, mailchimp has made it difficult to find RSS integration. Google search for mailchimp rss by email finds the relevant page with a link to the rss setup, to which we can directly click through if logged in to mailchimp. 
• After choosing the campaign email theme, we are redirected to a graphical design page. There, we need to drag and drop the RSS title and RSS content blocks into our email. Otherwise the RSS feed won't be part of the email!

Edit: Unfortunately, the RSS feed which I have mentioned above does not seem to work with Mailchimp. Since I don't want to use the blog/feeds/posts/default feed, I'm stuck with either manual campaigns on Mailchimp or some other solution. Perhaps using Google Apps Scripts, since the number of emails to be sent is very small.