Like most thing's, practice makes permanent. Once you've over learnt a skill to a certain degree its just going to become second nature to you. All it takes is a bit of determination, motivation an persistence and you will get there in the end. Yeah it may be hard at first but come on, its not exactly like you can pick up a bike and expect to be able to do everything straight off is it?
Just keep at is, don't worry about whether its hard or not, just practice and you will get there in the end