My first Lovebird I trained him to sit on my hand by emptying a big cupboard in the house.
I would then sit in the cupboard on a chair with the bird on my finger. every now and again I would open the cupboard door just a crick so the Lovebird could see what he was sitting on , and then immediately close the door again , then keep repeating.
I done this for a couple of weeks.
By the end I could Hold my hand up in the air and from anywhere in the room the bird would immediately launch and land strait onto my finger.
I would also stand at the top of the stairway. and lob him out of my cupped hands , he would then land on the door mat. but as soon as I put my finger up , he would fly verticaly towards me up the lighted and carpeted starway.
One day this regular practice went a bit wrong. When while I was doing it , my father opened the front door while the bird was on it's way down and I was at the top of the stairs. Pip went strait out and landed on the gate post outside. He could have easily flown away , but I think the shock of being out was so much that he just sat there. I then ran down the stairs and strolled over to the Lovebird and he hopped strait onto my finger.
Eventualy I could turn Pip over and leave him lying on his back , eventualy it got to a point where I could turn him over and he would'nt move at all untill I turned him over myself or picked him up.
But being a male and being so friendly and without fear of fingers. he innevitably started bonking
Try the dark closet technique , it might just work.