I am personally not an advocate of cheat days when you are dieting.
Set 3 clear REALISTIC goals for yourself, a short term (within the next two weeks), a medium term, "by 6 months" and a long term "9-12 months".
examples:
short term- get to the gym 3 days this week/
medium- lose x lbs, lift x weight, run x miles
long term- lose x body fat
Dont be afraid to adjust these if it looks like you will hit the marks too easy or early.
further advice...
never reward yourself with stuff that hampers your goal. Dont have cheat days that set you back. You need to stay focused.
Get my fitness pal app and start logging all your food, log a normal day of eating. Look at your macros and you may see where your problems are. Dont drop yourself from 3000 calories to 1200, drop yourself in intervals every few weeks. you need to give yourself room. Use exercise to help further the calorie deficit.
If you are really serious about losing some weight, go Keto and fast alot.
Exercise- Everyone is going to say to lift heavy things. I agree. But I am also a believer in finding a routine you enjoy. no sense in dreading the gym. If your goal is to just burn and you like lifting maybe look into stronglifts 5x5 as a start with some kettlebell swings to finish the days off. Try and keep the big lifts in whatever routine you land on. Bench Press, over head press, deadlift, squat.