I apologize for the delay in answering your question. I am sorry to hear you have suffered a stroke but relieved to hear that you only have a slight weakness on your left side.
Playing the piano is one of the best things you can do to regain strenght in your hand, fingers and even the arm area. I have taught many people piano who have had strokes that have impaired the body and not only has it been successful in regaining strenght, but this experience is both fun and rewarding.
I suggest you interview teachers to make sure the one that works with you is patient, caring, experienced and positive.
I am interested in your experience and would like you to update me on how you are progressing.
Contact me any time you need to for help or questions.
Thank you for contacting me and I wish you recovery and the very best.