I had a stroke like yours when I was 42, I'm now 47. My sense of balance still hasn't come back. I get around using a rollator, and I can drive, but I still can't walk. Even years after a stroke, people continue to improve. Albeit slowly. The 2-year deadline is a myth. As long as you try, you'll improve. BTW, I used to smoke too, but I gave up the habit when smokes cost more than $1/pack ('85).
Keep at it, and good luck.