Yes, you can do it yourself. Assuming only the bulb is bad, the cover will come out by pushing on one edge and pulling the cover down. If the assembly is broken, then the trim surrounding the light needs to be removed.
Remove the light cover then then check the bulb. If the bulb is good then there should be two-three screws holding the assembly in place. Remove screws and disconnect the wires connected to the light assembly making sure to replace in same order. Some have a simple plug that has a retainer you must depress. Remover and replace.
Remove the flashing around the cover with a common screwdriver. Remove all visible screws and place the cover to the side. Replace the bulb and then install the cover and flashing in the reverse order as described above.
Yes, they are simple. Snap of the plastic cover. Remove the light inside. Get the same type of light at an auto part store. Replace new light and plastic cover.
I most car you should be able to do this yourself. Not knowing what year of Town & Country I can say for sure. Usually there are either screws or clips holding the cover on. Remove it and then the bulb should come out sometime a little prying is required.
