Not dumb at all, you have to drop the pan and it`s a messy job unless someone has installed a drain plug, if not consider installing one. Pull the filter out of the pump, prolly have to pull the o-ring out of the hole with a blunt hooked tool. Install new filter making sure the spring clip bolted to the valve body is pushing down on the filter and not under it. Put pan on and fill with 5-6 quarts ATF depending how long pan was off and draining.
Jim