When learning to hover, be mindful of ground effect. The closer you are to the ground the more difficult it will be to hover the heli. Once it gets 5-10 feet up, it usually becomes much more trivial to hover as external forces (the rotor wash against the ground) aren't countering your efforts to keep things straight and level.

It's scarier to hover higher but IMO you end up with less crashes and less discouragement do to erratic behavior. My father-in-law has a Trex 450 and only hovers about 2 feet off the ground (he has never gotten past it) and is constantly crashing it.