Here is how an "old guy' does it. Set the ESC up with fixed endpoints. I used 1.0 and 2.0 milliseconds when running Spins. I'm now using 1.1 and 2.0 for the YGE. I use both throttle cut and idle down functions. With both switches off and the throttle stick down, the AFR and throttle trim is set to yield an output a little over 1.1 msec to get the desired idle rpm. The ESC will not arm with this starting condition so the motor doesn't start when you turn the receiver on. I throw the throttle cut switch and the PW drops to about .95 milliseconds and the ESC arms. I push my plane to the taxiway and throw the throttle cut to off and the motor starts in idle. ( With the Spins I had to jog the throttle stick to start the motor and get it to idle.) I taxi out and take off. Once in the air I switch to idle down so that when the stick is pulled all the way down the PW goes below 1.1 and the brake is activated.

One could do all of this with one switch, the idle down as JAS suggested but I like the safety of the throttle cut when I am on the ground. I once accidentally hit the throttle stick when I was pushing my DA 50 powered model to the taxiway. With the throttle cut activated the stick has no control and the motor cannot start or speed up.