I use the word diet to mean "eating at a caloric deficit". I don't know how else to say it. Weight loss journey sounds silly and lifestyle change means a lot more than losing weight to me so it doesn't seem quite right.
I started on 05/30/10 at 253. After almost 4 years and many, many breaks, I reached 152 on 03/19/14. Now I'm trying to reach 130.