Given the other answers about you not being an authority in the space, having your own etc. and reading your responses, I see this is more about the management/marketing of it.
Keeping that in mind, I would definitely make that part of naming the service. “Podcast Promoter” or “PM for Podcasters” or something like that, so people know you won’t be able with helping them become a great host/interviewer, etc.
If you can clearly communicate what you’re doing to those who need it (and god knows a lot of podcasters do), it can be a hit. I think a lot of this idea’s success rides on that.
More than we’d think, probably (it often does).