Podcasts are a leftover from the non centralized and non-monetized internet of the past. Because is that most Podcasts are still available as rss feeds, so you should only ever get adds if they are spoken by the Podcasts hosts. Ate you taking about those? Only something like sponsorblock would help against those. I use antennapod (fdroid) on android to listen to Podcasts. Sine hosts always start their podcast with an add, but you can autoskip the first minute of a certain podcast with antennapod every time. It has a setting for that. Antenna pod itself is foss software without adds.
its very easy to install via docker as mentioned above. Mumble is very lightweight. You could run the server on your desktop in the background easily or even on your router, there is a package for openwrt. The sound quality is awesome, voice is e2e encrypted and bandwidth should not be a problem either for a couple of people in the chat while you are playing.