Welcome! Have you found the Lemmyverse Explorer? It's a great way to find communities to join, and other instances in case you want to make a backup account.
Thanks for the all input you give to me. But, I’ll try to survive and continue to sustain in this instance as long as I can. Let say one day I’ve been kick out from this instance, at that time I’ll quit Lemmy forever.
All 3 are pretty active, although the bottom one is a bot community hat automatically finds rising and popular communities in the fediverse. The top two are similar, but one seems to be about just generally bringing attention to communities people want more users in (community promo), and the other is about advertising newly created or revived communities (new communities).
I personally subscribe to all 3, but I'm always trying to find new communities to add to my home feed. I prefer using that over All or Local.