You can put yummy stuff inside, by filling the mold about 1/3 of the way.
Let it cool a bit. Then add the yummy stuff, trying not to let it sprawl to the edges of each chocolate.
Then pour the rest (that is still hot and melted, don't let it cool or you'll have to re-temper.)
But I found this takes getting good at (and a tiny tool to push things around).
So I just dump the yummy stuff right in (just before pouring).
Stir it, and you can feel the consistency.
Sometimes scoops of thick glop are easier to manage than pouring.
Now, we leave it out to cool down.
When it gets about room temp, I stick em in the freezer overnight.
Not essential. But then they get really cold, so you can brand them!
They also sell packs of 1-2" square tin foil in various colors.
Helps me to color-code which flavors are which,
since at this point they'll all look about the same.