I have always been ambidextrous, but when I reached a certain age I simply favored my right hand over my left. Today I can write and draw with both hands, but it much more difficult for my left because, up until a year ago, I didn't use it for things that required dexterity. That may seem like a paradow, but all other parts of my body are ambidextrous, and I tend to favor my left hand for everything else, opening bottles, etc, but I still need much more work on the things such as writing, drawing, etc. Point is just work your nondominant side as best you can, and try not to push yourself to far, cause nodody likes injuries.