I would recommend you use a spark plug socket to remove the plugs. But first you need to remove the wires and heat shields.
The “spring loaded round pipe” is the heat shield. They come right off after the plug wire is removed. The trick to removing spark plug wires is to twist them first, them pull them straight off. There is nothing complicated to it. Sometimes the wires really get seized on the plugs so you need to work at them a bit before they twist.