Hi Bam, trying to kick alcohol, cigarettes and caffeine all at the same time is a pretty tall order. Also going on any very restrictive diet early in recovery can be rough. Doing all of the above in a depressed state of mind would drive anyone up a wall. I would tackle one thing at a time. If you can stay off the alcohol for 6 months to a year then tackle the other things.
As far as being stuck in a low paying dead end job, I realize that can be stressful in and of itself. I'm assuming your female and if so the nursing profession always needs people. You can start off as a nurses aid (most hospitals will train you for this position) and at least you could advance from there, (work toward an RN degree). My cousin who had never worked before started off as a nurses aid at the age of 45 then took classes and became a RN several years later.