You poor baby. I agree with Raster, maybe you should take this in smaller steps. First off is the cigarettes. It’s a tough one, so focus on that one as it is killing you the quickest. You can do the others together..I did. I was already smoke free for 9 years, so I gave up yeast, sugar and caffeine all in one shot. If you find it unbearable, break it down into smaller steps.
If it was me, I would do it in this order.
Second, sugar and yeast
Good luck, hun. We are all rooting for you.