I'm with the others, keep the full body. It obviously works, but the frequency will also serve as practice with the pattern/form/technique of the movements which is important for beginners.
Another thing to consider is that beginners can adapt/recover fairly quick so lifts can be performed often and progression made just as fast. Moving onto a 5 day split will unnecessarily drag out strength progression which, if the goal is hypertrophy, will also diminish gains in muscle. If anyone has the ability to add 10-15lbs a week to a lift (5lbs every or every other session) why would you choose a slower method?