Well some people start communities but are not up to task. There should be a well developed rules/about community page. I have seen just create a community post links and do very little to build engagement.
People are gonna look and leave if a community has like 10 members a new thread with a few replies every two to three days and links.
When I get a little time I will be creating a community. Either way level of engagement will take time to build but lackadasial community creaters add to the build time.
I created a community for the sub I missed from Reddit. It might not be everybody's cup of tea, but I will keep the content flowing to Lemmy every single day.. It takes me 20-40 minutes each day to look for interesting content but it's worth it.
As for the lack of comments they will come. The important part is being consistent.
This! Maintaining AND moderating a community is no small task, even in reddit times. You need to keep your block list fresh and look out for trolls; reminding rude users about not being assholes; banning nazis on the spot; upvoting interesting content and then posting your own. Doing this onLemmy/kbin is even harder, as software is still being developed and admins have their server issues. Oh and if you're an admin yourself, don't get me started on nazi instances and DDOS attacks. You need to blocklist bad instances entirely before they start ruining your users' experience.
So yeah, running a community is no walk in the park, especially if you're an admin. But if you persevere, it will be 100% worth it.
I recommend getting in touch with other mods / admins (is there an admin community? đ¤) and maybe follow Mastodon admins to see how they run their own. This is a team effort and things will run much more smoothly if we work together.
(I also recommend getting a Mastodon account for a backup communication channel, in case your own instance goes down or starts getting too big for your comfort. You never know and it's better safe than sorry. Think of Twitter users who didn't migrate, as a cautionary tale.)