How fat loss

Actually I am 91 kg weight and height around 169 cm.

I also have pcod which is cherry on top. last year i was going to gym doing the gym around 3 months my weight remains the same. It didn't change even a single number . Then I left the gym . Now I start again it's Been 4 days one hour and half of gym . So diet is actually killing me . Protein proportion and carbohydrates.

.what should I do.