Congrats on your decision! I find my cat leaves my thread alone, but tries to steal pins from my pincushion! I now keep all my pins in a box with a secure lid.
One word of caution, cats do tend to rub around your ankles, and could possibly cause you to fall if you are not careful. Try to train him/her not to be underfoot, especially on stairs!
I know you will love having a cat. They are easy to care for and very loving. Mine brings joy to me everyday.