I know this is late, but I thought I'd give my opinion. Riding a motorcycle is different than learning another skill like golfing or typing. Riding a motorcycle fast involves dealing with fear. At some point, to progress (e.g. lean more, carry higher entry speed etc...) you have to push through your fears. To sum up my advice on learning to lean more...
Look
Lean
BELIEVE
Do it in small increments and you will be shocked what a motorcycle can do. Oh and don't forget sticky tires.