I focused on diet for three months and lost 30 pounds the first two months. My loss slowed significantly after that. Once I added exercise, the scale slowed dramatically
but the inches flew off.
That's really important.
You mentioned shakes. I started with easy counting calories using Slim Fast, Lean Cuisines and protein bars. I found after a while I was lethargic and constipated. In switching to a more whole foods life style those problems went away.
I tell you all that so you know that it's ok to start wherever you are!! I think most of us started in a place very different from where we end up. Your lifestyle is going to change just a little bit with each pound lost and it's amazing and if you take it slowly, it's also quite enjoyable. If I had jumped in as I am now, I would have kicked and screamed and failed. As it is, I couldn't be happier with all the changes I have implemented and it has been easy. I tended to change out one food every month. So one month I took out Slim Fast and experimented with steel cut oats and eggs. Another month I took out the Lean Cuisines and experimented with making my own versions.