In my opinion, most of the small toy quadcopters are not so easy to fly. The very basic autopilot does not assist you much. There is no altimeter and the throttle is inconsistent, so they unexpectedly go up or down, or they fly in a new direction without your order. You have to dedicate a good part of your attention to ride the throttle and keep it steady. The controls are twitchy and too small (you can glue on joystick extenders to help). With no GPS or vision to hold position, the smallest breeze will blow it away.
But they are very fun once you get the hang of it. If you have the prop guards on the X5C, you can fly it indoors to gain skill. Without wind, learning is a lot easier. In close proximity, you'll have no orientation uncertainty. At first, just learn how to hold position in midair, then do small maneuvers - yawing being the most difficult with these toys. Eventually you should be able to fly small figure-8 patterns in a room. Keep away from glassware and HDTV screens, of course. Once you can operate the controls without thinking too hard about it, go back outside with (on a calm day). The nice thing is that the controls are the same for more serious aircraft, should you decide to move up. And you'll find the more advanced models are much easier to fly.
Yes, the headless mode may be helpful for a beginner. But eventually you will want to learn to fly without it. To help with visual orientation, you could spray fluorescent red / orange paint on two of the booms.
The Hubsan X4 is a lot smaller than the X5C, but some variants are available with "altitude hold." The altimeter function is not perfect, but it certainly helps... one less thing you constantly have to pay attention to. The price varies, but Amazon has had them in the range of $30. Fine for indoors if you get a prop guard. They seem too weak for flying outdoors in a breeze.