What exactly are you asking?
You would emit a signal, causing your Ship to start following the PathFollow2D's position, while starting the PathFollow2D's Offset or Unit Offset.
You'd need to figure out if you are going to set the Ship to always be exactly at the Follow's position (absolute position), or if your ship is always going to try and move towards the Follow's position (this one can be trickier since they need to be just close enough in speeds or your Ship is going to fly around over the Area2D or around in circles over the Follow's position.
You also need to work out which direction to fly in, and reverse the offset if needed.
