Github is the right place s most of the development is discussed in the issues and PRs there. There's also the Matrix space https://matrix.to/#/#lemmy-space:matrix.org which has various chat rooms regarding Lemmy/Jerboa development.
Also you're... me? :D At least our taste in usernames is very similar.
I played Into the Breach to death on release. I even got all the mechs and achievements. Just looked at it again and it got a free Advanced Edition update?! Holy shit, brb playing the game a 3rd time!