sorry to hear about your dad mate ,im sure your dad would be proud of you knowing you have decided to kick the habit ,as thats all it is is a habit ,im off them for near on 6 years now ,i gave them up for my kids as i smoked 50 a day,
i would get alan carrs book mate its a inspirational read and will kickstart your brain into quitting mode ,i have never looked back except for the cups of strong coffee but havent managed to drink fifty a day,well not yet

best of luck ,