Hello I am much in the same position as you I am post menopause, on steriods and I started Clean Eating and Calorie cycling and I am finally losing weight after about a year of doing WW and working out faithfully at the gym and not losing anything!
I found SP by accident and lurked for awhile saying this won't work....it does. I have lost slowly but surely 20 lbs since Oct. I just completed my first week of Clean Eating and lost 1.8 pounds. I am very happy I am here!
I too am looking for online sites to shop I have found Bobs Red Mill he has alot of stuff but haven'e ordered anything yet.
Here is the site
check it out.
Welcome and good luck.