Ease into it. Try cutting x grams of daily carbs per week until you get down to 20 grams/day or less. Make sure you're getting more calories from fats to ease cravings, also try to increase the between-meal times.
I’m for whatever works.
For me it’s keto and/ or paleo. With the caveat of enough occasional cheating to avoid totally depriving myself.
For most of my adult life, simply eating light worked just fine. And then after 60 that no longer worked for me.
Lastly, if you just cut out all sugar, all processed food that comes in cardboard boxes, and seed oils ( canola oil, safflower oil , corn oil ). Switch to avocado oil and olive oil—- if you do all that , and continue eating your bread and pasta and potatoes, then at the very least, you will be doing yourself a world of good. And also lighten up on the alcohol.