Supporting With The Right Capabilities

Here is a typical ecosystem of platforms to enable self-promotion:

Distribution:  Anchor, owned by Spotify. It has some basic editing and sound effect features and is free to use with some basic analytics.

Website: A podsite service called Podpage.

Editing: Descript, a transcription tool, to record and edit WYSWIG each episode.

Mailing list/CRM: Mailchimp 

eCommerce: Gumroad 

Links: A paid version of Linktr.ee

Social: No surprise, Instagram is the biggest driver

Music: Distribution to Spotify, Apple Music, Soundcloud, Amazon Music etc. can be done through Distrokid.