As someone who's done so in the last year, the only way you can start and podcast and find enough success to be even remotely viable at making any money is to already be famous/have a like 10k+ following on twitter... and even then it's a maaaaybe. Or know a Chapo host/person with the same equivalent level of podcast success and have them guest on your show or vice versa, so they promote it to their audience.

Sincerely, someone with a podcast where each episode gets, at most, 20 listens