I use Ardour. It looks pretty complicated to use at first glance, but everything you would need is there in one of the four modes in the top right corner.

I’ve tried Reaper for the plugins and the generally good reputation, but I couldn’t understand the empty interface whatsoever.

You can do that, but if you don’t want 20 different accounts, I would recommend signing up to just one. Lemmy and any other federated social media system should push posts from other servers to your feed depending on what servers are in region.