YouTube = free [video]
Vimeo= free [video] with limits, or you can pay
Podcasts (we use BuzzSprout, but many available, and some are free eg BuzzSprout let you upload so much for free, but it gets deleted after so long)
Facebook = free
Instagram = free
A few ideas to get you started
A Website is an option, but best to let a proper service provider to handle playing the audio for visitors - if you upload audio to your website you're then reliant on bandwidth from the web company, and they're frequently very stingy
Andy B
@Justinmartyr I'm always happy to share what we've learned
Andy B