1) MAKE SURE YOUR AUDIO QUALITY IS HIGH!
There are thousands of podcasts to choose from and podcast fans are fickle. Have a slight buzz in your podcast? Don't expect a new listener to spend more than 30 seconds giving you a chance. Luckily podcast equipment, like most other technology, has become very affordable. For a few hundred dollars you can build a studio at home that would compete with the audio quality of any podcast you currently listen to.
2) CONSISTENCY IS KEY!
To turn someone into a hardcore fan of your podcast you will need to make sure you are releasing your show at the same time and through the same channels week after week. Imagine tuning in for Game of Thrones one week and you find that it isn't on. Then randomly 3 days later it shows up on demand with a note from a producer that said "Sorry guys, got crazy busy with the dog walking business!". You would be furious! You don't want your listeners annoyed. There are so many free amazing podcasts out there. They will just move on to another show. Same time. Same day. Same channels.
3) DO A DEMO!
Do a demo or two, or three, or ten! Building a strong dynamic takes time. Before releasing your show I would do a few practice runs. Get the nerves out of the way. Get any tech issues out of the way. Get comfortable with your co-hosts. You can always release these episodes down the line or if (GOD FORBID!) you have to miss a week you can use a demo episode as a replacement!
4) DON'T THINK ABOUT MONEY---YET!
There are a lot of channels to monetize your show now. Everything from Patreon, to donations, to advertisers, to merchandise! There are a lot of ways! However, I wouldn't think about making money off of your show until you have a strong following of at least 20k downloads per episode. Your focus should be on making every aspect of your show as strong as possible. If you are constantly increasing your audio/video quality, the quality of your performance, the way you are marketing your show, etc... naturally your listenership will grow and that is how you make real money for your podcast.
5) ASK YOUR FANS AND FRIENDS TO SHARE!
Sales 101! If you don't ask for the money you are not going to close. Podcasts grow because of the fans. Period. No other way around it. Get your fans excited about your show and they will share it with their friends! Especially if you are a show that is brand new and no one knows about. Everyone wants to be on the forefront of what's new and cool! The listeners are your brand ambassadors. They will go to war for you. They will drum up interest. Ask and ye shall receive!