+1 on the previous advice--especially about rehydrating dry lather.

As for learning how to shave faster. Relax. That will come in time. But it should never take precedence over shaving closely, comfortably and above all safely.

Keep in mind too that the cause of lather drying out is not always because of the speed with which you shave. It can also be caused by low humidity in your house, especially during winter.