Do not worry about how long it takes to shave. As others have noted speed will come with time/experience. For now just allow for plenty of time and enjoy the experience. As for the neck area you need to determine direction of hair growth and learn to go against the grain on second and third passes. This will take a lot of trial and error but stick with it and you will get it. Before you know it your shave time will be cut in half, but only if you do not worry about the time.