RSS fans!
You can follow any Mastodon account via RSS by just adding ".rss" to the end of the account's public profile URL.
To find a user's public profile URL, click on their profile image within Mastodon.
For example, if you click on FediTips' profile image you get this page in a new tab:
https://mstdn.social/@feditips
So, to follow FediTips through RSS, use this address:
https://mstdn.social/@feditips.rss
This will only show that account's public posts. Other posts will not be visible on the RSS feed.