How to replace old ceiling fan-light with just a light fixture
I believe that you have a standard switch loop, coming off the black bundle as white and returning as black. That return black, which is connected to the red wire, is your switched hot.

So...

The white from your fixture goes to the white bundle (possibly without the jumper, which doesn't seem necessary).

The black from the fixture goes to the single black wire (to which the red is now connected).

The black from the fan that connects to the black bundle will simply be eliminated.


Make sure you have a good understanding of how to make safe connections with wire nuts, including the capacities of the different nut sizes.