How to configure dashboards - is there a HowTo document?

I’m really new to HA but so far totally love it! I am confused however about how configure the dashboards and wonder if someone can point me to some documentation? My specific question at the moment is that I just installed the efergy plugin and ended up with a bunch of, I guess unclasified items at the top of my dashboard like this:

ha

I have no idea what the Updater is, the “Home” one relates to my iPad, the Per-Device Usage relates to efergy and the sun, well, relatest to the sun I guess. How do I move these things to categories on my dashboard OR just hide them from the dashboard? I don’t want to edit the default lovelace UI as I like the fact that it adds stuff by itself.