How can one effectively practice playing rhythms in a 3 against 2 polyrhythm?

To effectively practice playing rhythms in a 3 against 2 polyrhythm, start by clapping or tapping each rhythm separately until you feel comfortable with each one. Then, try combining them slowly, focusing on keeping each rhythm distinct and in time. Gradually increase the speed as you become more comfortable with the polyrhythm. Practice regularly to improve your coordination and timing.