WOMAN IN NEED OF WEIGHT LOSS HELP!

I've struggled with my weight my whole life, always being bigger than the other kids, taunted for even picking up a fork or a spoon. I weighed last year 200 even and I never been 200 before so I was sad, then I quit cheer so I gained even more weight--- 30+ pounds of weight. The highest I got was 240 but it fluctuates heavily some days I am 12 lbs lighter than I was 2-3 days ago then I gain it all back in a week. I would love to atleast be 200 again but I am just a high schooler who doesn't have money for a gym membership or professional help. Please someone help me 💔😞! I want a summer body!