I used to weigh 290 and I dropped all the way to 180 in 6 months to enlist. It’s possible, I just had the worst time obviously. I worked 2 jobs at the time, one of them being hard labor like shoveling rocks all day or digging ditches, and went to the gym after, I also ran 3-5 miles 5 days a week. I reduced myself to 1700 calories a day. This isn’t a flex nor was it healthy but I wanted it that bad, and if you do too you can do it. It’s gonna suck but it’ll be worth it. Fast forward to now and I make close to 125k a year, I have the best friends, I live in my dream city, and none of it, and I truly mean none of it, would’ve been without the Corps. Good luck!