If you're talking about the equivalent of a subreddit here on lemmy.ml, that's just called a "community". Click the "Create Community" link up at the top of the site. If you want to create your own whole Lemmy site with its own communities you can do that too, but you'd have to read the documentation on that.
Thanks. I tried to create c/sysadmin since I didn't see this one in the search results. Hopefully I can foster some discussion for the sysadmin community.
Why is it Chrono Trigger? Because it's Final Fantasy VI. :P
"Over" with Putin having gotten what he wants after killing millions of Ukrainians and still occupying their land. So no, fuck Putin and fuck anyone who supports his insane bloody quest for glory.