Hi leefitzy,
I had the same problem with my right hand about 11 months ago following an ischaemic stroke. My OT told me to try beginning to write again with my right hand. Initially I was terrible, but she told me to keep doing the writing and it would improve. I did, and it did. Getting my writing back to normal took about two months but it improved my keyboard skills. I stopped hitting the wrong keys and now I can type on the keyboard with a reasonable speed. Try writing, keep doing it and see how you go. Try doing crosswords. It will help you place your writing more accurately. Persistence worked for me.