I did this

Homo Diet Healthy Way of Eating

its called the optimal diet.(don't let the website name throw you ). İts not really a high protein diet-its more of a high fat diet of natural fats-butter .animal . and high quality vegetable oils like olive and coconut.
lost 44 pounds in 2 months with 0 exercise at first.And nothing to buy online.
Once the weight started coming off I had so much energy from this I had to exercise!
Another benefit is that I went from 8plus hours of sleep a day down to 5 or so.
Look at it and see if you can do it.

I got to warn you though-the first week you can be grouchy as you do not get a sugar or carb fix.After that you level off on the attitude....or at least I like to believe I did. At 3 or 4 weeks food is not something you do for enjoyment( ie comfort food-happy meals etc)..you eat because you have to.Not because you want to.

Good luck