Looks ok to me, they all do that sir Initiate yourself slowly, dont go finding it all out in one sitting Just add it to the jobs to do list, You’ll be tinkering for years yet
That switch supplies a relay in the boot, there will be a sensor behind the number plate and when a magnet(in the key fob) moves across it,the boot pops open. So walk to car,unlock doors and there is no need to go in the car.