New

Good Day all!

I am extremely new to bitcoin in general. I've heard all sorts of terms thrown around when referencing bitcoin. Things like "miner" "home mining" "nicehash"

I think the miner is pretty simple, I've seen ones you just plug to a USB and then to wi-fi and they "Mine"(?) for it in the hopes of getting a "block"(whatever that is). Is it worth it?

Can someone explain to me Barney-Style?