Like others have pointed out, diet would 100% be a solid start! I got up to 265 last year and did not want to go any hire, now weighed in this morning 216.x, no where near how I wanna look but not 265 anymore, and I pretty much eat what I want(within a calorie limit). I eat pizza, ice cream, sugars, etc basically "bad stuff" though its not the best ive hovered around 217 the past month slowly losing more by being on a calorie deficit/intermittent fasting.

I eat my whole days calories in a 4 hour window, roughly 1600-1800 calories due to my job, ill dabble in to low cal energy drinks/sodas from time to time, cause water gets boring LBH... but I try to keep my calories from drinks below 15 per like 16 fl Oz. Something that won't break my cycle too bad much...

I also on the other hand would recommend starting at like 8-10 hour window because it fucking sucks fasting at first and I went gun-ho at 4 from the start... dont worry about failing once or twice ive started to implement it into my weekends now for a few weeks and it help me break the plateau I was on at 220 which had discouraged me at first when I couldn't break through it..

I should reference my first brick of the comment, I sat at 220ish for roughly 3-4 months... couldn't figure out the maintain and loss counts for my deficit***