For hovering enter a vertical with very low power and enough speed so it wont snap out as you pull it into it.
Let the plane just about stop as its going vertical. At that moment add power to sustain the hover.

If you enter it with full power the plane will just climb and climb till it eventually runs out of speed. Problem with that is that you will be holding power in and you wont have enough reserve to actually sustain the hover.

Get it vertical, let it stop and then catch it with the power needed to hold it there.