How do I replace right front headlight on 1996 Town Country Van

If it is only the bulb, you will need to take enough "stuff" out of the way to access the center of the reflector bowl under the hood so you can twist the bulb holder loose.
When you get all the "stuff" out of the way, use a strong light and perhaps a mirror and you will see what to do ask you progress.
If you wish to replace the whole headlight, type the make and year into the "e-bay" website, ( as I just did), and you will see them for sale.
They are pictured clearly, so you can see what it looks like before you start the job.
God bless your efforts.