1. practise virtually: there is an App called 'QuadcopterFX Simulator' you can fly drones from first person perspective and the gimbal view. It helps a lot to get used of the controls and orientation. You can even simulate wind.
2. buy a test-drone: For 100$ you get the "QUADROCOPTER BLADE NANO QX RTF" a great agile little drone for practice (without camera). The controls will be the same as the quadcopters. You can crash into a wall and this drone will survive... it's meant to be. (byproduct: It's lots of fun flying this fast little thing)
3. Buy your camera drone (Phantom, Solo One,...) and practice