Welcome Elaine, I was a 30years+ smoker. I did give up once and gained over a stone! So started smoking again and it literally dropped off again without me having to do anything!
Since switching 100% to vaping I have gained...a whole 2 pounds! So could I suggest that you may well find zero nicotine might be worth a shot first? There are some gorgeous flavours to try (I can't stand the taste of tobacco flavours now), fruits, desserts, which I wouldn't think would make you even think of cigarettes.
If, on zero nicotine, you find you are still really missing cigarettes, then it could be the nicotine you are craving. In which case, you could try the lowest nic liquid first and see how you go.
Best of luck and I'm sure you'll find something that works for you.