Arm fat 😫

Hi so I’m new here and I rlly want to loose the fat on my arm as it makes me feel really self conscious I have tried lifting and eating healthy but I’ve never been able to find the right diet or the diet is waaaay to complicated and my mum is not interested in helping me stick to it there are girls in my year who STARVE themselves it seems like but I can’t live without food. Please can someone help me find the perfect diet or weight loss plan