I made a cross post for example, even asked an admin, but still my communities hide in shadows.
https://feddit.org/c/pacmemes
https://feddit.org/c/musicmemes

What else can I do?

Have subscribed to your own community?

I have an account, does this count?
If not explain it to me like I'm 5 years old.

Someone with an account on an instance needs to subscribe before it shows up on that instance.

How?

So posts in communities only go to instances where there is a subscriber. If you make a new community, people on other instances won't see it until someone on their instance searches it up and subscribes.

For new communities, two things to do are to submit on https://lemmy-federate.com/ which will automatically federate it to instances that have signed up for it (I've just done this for you), and to post it in new community sharing communities so people know about it and can subscribe, e.g. https://lemmy.world/c/newcommunities

Making an account and subscribing to it on every instance.

But someone has uses lemmy-federate and done it for you, so now it should be visibly mostly everywhere.

You may want to also use !newcommunities@lemmy.world and !communitypromo@lemmy.ca too if you want to reach every possible instance by alerting people on them.

I subscribed to !pacmemes@feddit.org from sh.itjust.works. Maybe you'll get more traffic now.

I'm just doing this so the link works right for me

!musicmemes@feddit.org

Great write up. These are the steps that make adoption "difficult". Not that it's hard, per se, explained very well here in fact. But these are steps that aren't necessary on more commonly used networks. Having to explain that "all" is not actually "all" always feels wonky.

Thanks.

Thanks, I get it now.

Home instance agnostic links :

!pacmemes!pacmemes@feddit.org
!musicmemes!musicmemes@feddit.org

type !communityName@hostInstance.com to create a similar link next time