The best place to start in the RC plane hobby is with a trainer. They are inexpensive, easy to fly and more crash resistant. They are capable of being flown at slower speeds giving you more time to think about the controls and more time to correct any mistakes. The more basic ones are 3 channel meaning you can control the speed plus up/down and left/right via the tail. Then for the more adventurous there are the 4 channel. These are a little more difficult to fly because you can also control the flaps on the wings to bank left and right but this gives you more maneuverability and allows you to perform tricks like rolls.
Trainers
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WL Toys F949 3Ch 2.4GHz RTF Cessna 182 Radio Controlled Plane
€69.99 -

Wing Dragon Slow Flyer RTF 3Ch Trainer RC Plane
€99.99 -

Hawksky V2 4CH Brushless Sport Trainer RC Plane 2.4G RTF
€199.99 -

Hawksky 4CH Brushless Sport Trainer RC Plane 2.4G
€174.99 -

Mini Cessna Radio Controlled Plane Brushless version 2.4GHz RTF
€99.99 -

Cessna 3G3X Brushless RC Plane RTF 2.4GHz - Autopilot Version
€149.99 -

Mini Skyfun Delta Wing 4Ch RC Plane With Auto Pilot RTF 2.4GHz
€119.99 -

4Ch Cessna 182 RC Plane Brushless Version RTF 2.4GHz
€134.99