Pick a system that seems it will work for you and practice! Please remember that quality queen producers look at MANY variables and work hard for MANY years to be able to produce truly quality queens. If you're wanting to do this for fun, knowledge, or maybe to expand your own bee yard(s), be sure you graft from your best queens (MANY variables here too) and use the BEST cell starter/finisher hives and flood the area with the BEST drones. If you're thinking of doing this for income be prepared for failure for several years until your technique evolves to near perfection and you gain a much needed reputation for quality.
Scott