Here are some recommendations to make this learning process easier.
This allows you to more easily determine the movement of the helicopter because the ground provides a visual point of reference.
This also allows you to more easily determine the orientation of the helicopter. If the disc of the rotor blades appear oval, then the helicopter is not level with your eyes.
Also, the helicopter will suffer less damage from a 5 ft crash than from a 30 ft crash. Some helicopters (like the Corona) will probably incur no damage, and you can simply walk over and set it upright and continue practicing.
You should be careful when flying outdoors if there are visually distracting items in the background such as trees, houses, etc. This "background clutter" can pull your eye's focus away from the heli which can result in a crash. You should avoid hovering your heli in front of background clutter so concentrating is easier.
It looks really cool to paint your helicopter completely black; however it rapidly becomes less cool when you realize you can't see the orientation of the helicopter beyond ten feet.A black helicopter rapidly turns into a silhouette, and becomes very difficult to fly.
If painting, be sure to paint your canopy a bright color. Flourescent neon colors work well. A two-tone color scheme where the left side is painted a different color than the right side helps visual orientation considerably.
Black blades are cool, but they turn almost invisible when hovering. White blades are much more visible.