I'm not a DBA and know next to nothing about databases. At the moment I can only really contribute to Meta.  

I'd love to contribute and ask/answer questions about Unix/Linux/Python/C/C++/Git/Ansible/Go/Servers/Filesystems/Networking/etc.  I understand that there are only two sites at the moment, but what does the process of adding more look like.  

I understand if the site wants to be careful expanding too quickly without a proper meta model in place, but at the same time I'm using SE until different sites are added.
Top Answer
Jack Douglas
Here is the meta post where you can request a new community, along with an example (TeX, currently in private beta):

@@@ answer 284
How do new sites get added?
Jack Douglas replying to holmanb
that's good to know, thanks — please consider joining the discussion [here](/meta?q=530)
I agree that the philosophy overlap here is definitely better that SE.  I know many users (readers), but no contributors unfortunately.  I am happy to contribute however I can though as time allows :)
I am one of those frequent users that rarely posts. https://unix.stackexchange.com/users/219645/brett-holman
Jack Douglas
Caleb has been active here and may be interested in participating, but I don't know any others personally myself
Jack Douglas
have you got a U&L account on SE? no worries if you don't want to share that information…
Jack Douglas replying to holmanb
I'd been wondering about a *nix community. I had a feeling that our non-profit sharing philosophy here might be attractive to some of that crowd. Do you know any SE (or ex-SE) contributors who might want to get on board and start building things up here?
holmanb replying to Jack Douglas
In terms of SE equivalents, a Unix/Linux site would probably be most interesting to me initially.  IMHO SO is a catch-all that should be subdivided.  To help "community creation" scale, perhaps when users sign up for an account they could get a survey for what communities they would to see in the future (using fuzzy-searches to bucket the responses).  That way  community creation isn't a product of the "squeaky wheel gets heard" phenomenon.
holmanb replying to samcarter
Jack Douglas
@holmanb can I ask which of Unix/Linux/Python/C/C++/Git/Ansible/Go etc you are most keen to see? Basically we need to get a few people together who are passionate about building a particular community to get the ball rolling — and at that point I set up a private beta (like the current TeX beta). 'Graduation' happens as soon as the beta participants think they are ready. I'm strongly leaning towards *not* having an SO equivalent here but instead breaking it down into smaller communities.
@holmanb If you would like to propose a new community, the following link might be interessting for you: https://topanswers.xyz/meta?q=211#question