[Help] New self-hosted instance not crawling communities

Just got my own instance up and running finally, but it doesn't seem to be federating as expected.

I can search for and subscribe to communities, but unless I specifically search for the URL (e.g. selfhost@lemmy.ml) nothing shows up. I'm also making this post from my instance as well (to see if anything happens...)

Is this something I just need to wait a few hours to happen or is something incorrect.

Thanks in advance

Edit: Oh, and when I do subscribe to a community, I can only see new posts. It doesn't retrieve older posts