First thing, in addition to your choice of projectors and some misc connectors, you will need to obtain some automotive plunger switches. These from Amazon worked well for me.
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
*** UPDATE: NEW SWITCH ***
Then view the Lethal Camaro videos on door trim removal.
https://www.camaro6.com/forums/showp...22&postcount=1
https://www.camaro6.com/forums/showp...15&postcount=1
After you have done it this way once or twice, you see that you can just grab the top of the trim and PULL away HARD (after removing the screws, of course), and save some steps. But you should do it his way first to undestand how it all fits together.