Spirtual warfare is always a noble and useful task to do, but most newbies should have a basic spiritual foundation set before doing it. Cobra himself has given his take on this saying that to have at least 6 months under the belt for most people is recommended before undertaking spiritual warfare tasks. In the grand scheme of things, a few months to a year is a short time and your developed self is much more useful at that point instead of now.
If you happen to be one of those who have no trouble with cleaning and protection meditations and have no trouble rising energy for tasks and otherwise feel secure and confident in your abilities and well-being, then head on to do it, otherwise it is better to focus on foundational aspects of your spiritual routine.