the obvious answer here would be "just practice the RH more" but is that really the answer?
term: I think your left hand learns faster because the right hand already learned it and so your brain is prepared. And this is great, because one hand can teach the other!
The left hand is always the better hand, except if you have dextrocardia. I'm right handed and my left learns faster by a rate of approx. 3:1.Yes, there's no way to get around that. Practise rh only for extended periods of time. You will find that your left will catch up easily as soon as you use it again.
Just because your left hand learns faster doesn't mean everyone's does.