Hello!
As you live close to where I live (Sweden) I could perhaps give you some advise.
In Europe only the 35Mhz band is allowed for airplanes and helicopters. This band contains more than 20 frequencies! Surface vehicles like cars or boats are not allowed on this band!!!! The reason is safety.
Cars and boats can only be run on the 27Mhz and 40 Mhz band. You are allowed to fly on these bands also but you are running the risk of getting shot down by a car or boat hobbyist.

As for the JR car radio which has the novelty of changing frequencies without changing crystals, means you can choose your frequency by just turning a nob on the radio.
But remember...you can only do so within the band you have...let's say the 75Mhz band,
Which contains many frequencies.

So my advise is to get a simple car radio on the 40 Mhz band and get an airplane (heli) radio on the 35mhz band.
And do recommend that you get help from a club using a trainer and "buddy box system" when you decide to start flying. Trying to learn by yourself could be very annoying....

JR makes good radios..I have used these radios since they first started to come out in 1980.
I now use a JR 388S.
Regards!
Jan K
Sweden