I learned how to hover on my trainer and i just kept practicing untill i got ok at it.
Mind you im not a profesional as i am new to 3d and stuff like that but all it really takes is practice. you don't use ailerons much, mostly rudder and elevator. Start up high just incase or you know what could happen :shock: , can you say ground effect
Just my 2 cents, im sure there are more qualified bros that could help you better