Ceiling box has 2 black and white wires but fan/ light only has 1 of each
Here's what I think is going on.

The box in your ceiling is not connected to any switch.  It was used as a splice box. That is, when two wires are connected, the connection must be accessible, (not behind drywall) and in a properly rated box.  The blacks are always hot, and it carries on to another outlet or switch in your home.

If you want your ceiling fan and light to be controlled by the pull chains, then it's simple.  Simple attach the black and white wires in the fan/light to the same coloured bundles.  I recommend using a pig-tail to do this.

If you want it operated by a switch, you'll need to do some wiring, which can be awkward.  I'd ask another question for that.

The other consideration is weight -- You need to make sure the ceiling box is sufficiently supported.