The most important thing is to make the choice, that you want this. Then, be consistent in whatever method you start with.
Its not going to be easy. It will be work.
You don't have to quit everything and completely change your life overnight, it takes time, a long time. This is why its a life choice, not something you "try."
Also... You don't want to lose weight, you want to burn fat. Think about that way, it changes everything.
For me I started at age 40. I am 5'10" and was 245 lbs, size 36 waist and my belly still hung over my pants, lol...... I had literally no muscle mass. Up to this point was a heavy gamer and drinking two 2L of coke every day, and pigging out on 5000 calorie dinners of deep fried chicken, fries and gravy.....
I started with biking, (as I didn't exercise at all) and I lost 30 lbs in a year, and vhanged my diet by eating less. While it helped, it wasn't until I changed my diet cutting out milk, sugar, salt, and all processed food, and stopped drinking alcohol that I was able to burn the fat.
Then comes the disappointment.... seeing my body at 40 years old, skinny and no muscle mass... but it was short lived because no longer carrying around 60 pounds of extra weight, I had tons of energy.... so I started weight training. I was down to 174 and now gained up 188, and I have a six pack now!
It took me 3 years, of 5 times a week gym and cardio to fix 40 years of abusing my body.
I really recommend Hi Intensity Interval Training (HIIT) for cardio and weight training for building strength and muscle mass. No you don't have to go big either.
This is what is eat for dinner 5 days a week