If you are just learning, then yes, 2.4Ghz is simple with no crystals or fixed frequencies to mess around with.
With 2.4 the transmitter set just looks for an available channel and then pairs itself with the reciever.
Some 2.4 sets can be so cheap new, it is not worth buying second hand.
The older 27 MHz sets were more expensive and you had to mess around with crystals if you needed to change channel, because someone else was already on your channel, you had to change crystals.