starting my -33kg journey. need advice!

hi! 18f here. im currently 87.5kg and my goal weight is 33kg. i want to get into a calorie deficit but i’m not really confident that i know what to do so i came here to ask for advice. do you have any calorie tracking apps that you recommend? preferably free!

do you guys also have weight loss tips that you want to share? any advice will greatly help 🥹

thank u so much!