I tried some of the RSS-to-Fediverse projects/services but ran into one issue or another. Last month I released a web hook integration that makes Ghost a 1st-class citizen of the Fediverse. I specifically wanted my fediverse address/domain to match my Ghost domain, which the RSS services seemed to struggle with. For example, my blog is https://quigs.blog and my Fediverse address is @quigs_blog@quigs.blog.
If you use Ghost Pro you will need to use a subdomain (Eg: @username@fediverse.example.com) unless you pay for Ghost Pro Enterprise and have access to the same reverse proxy/url rewrite tools as a self-hosted option. More info can be found here:
And here: I wrote a Mastodon/Fediverse/ActivityPub integration for Ghost
Any feedback would be appreciated!