What diet could I do to get as skinny as possible and stay there?

I need a sustainable diet, I’m bad at portion control and would like it to not be tooo expensive of a diet. Calorie counting doesn’t work either cause like I said I like eating whatever portions make me satisfied. I am currently overweight, my blood tests say my blood sugar is normal but my triglycerides are between 150-190 I think which is above because the average should be 100 or less but it is also not too high since it can go up to like 500. I would like to follow a diet that makes me as skinny as possible and that I can sustain forever. This is my situation please recommend me any diet that you think will help me and give and tips or advice if you’d like, thank you.