The DX5 is not a full-range transmitter. If you intend to fly only park flyers, then that's ok... but if you wish to do both park flyers and full range RC, meaning flying glows and more powerful and capable electrics, then you want a full range transmitter. The DX6i is probably a better choice.

Mode two has the throttle and rudder on the left stick with the aileron and elevator on the right stick.

What is best for the beginner is a good radio that you can fly with, and expand to more than one model. The Spektrum series are fine for that. And, they can be matched up with another similar radio as a buddy-box which allows you to work with an instructor on the main transmitter with the student on the "buddy box" transmitter.

CGr.