That airplane is a Trainer. You will have much better success using a 11-4 0r 11-5. A 10-6 being the proverbial .40 size will work however you will have a better landing experience with the longer diameter and less pitch.

I do not recommend the APC although many will argue that. For a trainer I want good steady performance in all realms of the flight profile, not the best in just one profile.
I forget the brand because in all my other areas I use wood props.

It's the black one with squared tips. Performs well in all regimes. It's been many many years since I called for, "Mixtures, Rich, Props full increase" but on an RC models the lesser pitch is far better on the landings than vice-versa of such as the 10-6, 9-7, etc.

Some years ago a number of area clubs participated in a 4-Star Racing club competition. ST 40s, Sig 4-Star machines. Had to use 9-7 props. Everyone had problems landings unless they killed the engine. For fun put a 11-4/5 on it and landings were a piece of cake.
Like a pylon racer, short and high pitched prop, try to land with the engine running and you need a 1/2 mile of low final approach. Best to kill the engine.