Starting a podcast

Based on the experience of your coaches who have successful podcasts such as Katrina, Rachel, Jody, etc., should I invest money on a class to launch a podcast and if so, how much? I’ve seen DIY classes from Pat Flynn for example that cost $800 and others that are upwards of $5000+. I’m not experienced in this so not sure how much handholding I need. How much did you spend on learning to launch and marketing the podcast (not the equipment)? Thank you!