just use a master airscrew 2 blade black nylon prop - size 11x5 or 10x6....i liked the 11x5 better

You will strike the prop on the ground while learning to taxi, take off and land. You can balance the prop if you want to but I have never seen anyone balance the prop after a ground strike with a trainer. Most, just attach the glow driver and give the engine a flip, then back into the air.... You are going to want to get as much airtime as possible with your instructor and they are not going to wait around for you to balance your prop every time it strikes the ground.

Just my opinions....

On bigger engines - It is necessary to balance the props.

The 3 blade props are expensive, might break and will require balancing after a ground strike.