Loosing weight?

I want to start dressing fem in private but I have a huge belly gut I wanna get rid of first I ain't in a rush to get rid of it but any tips is nice also I want to start crosplay(what I call Cross dress cosplay) and then eventually wanna come out to my dad since I came out as nonbinary and he was chill with it but he doesn't like my aunt as much since shes trans

Edit thanks for all the tips I saw some one say their fem with belly and it's fine I know it's fine but I mainly want to loose mine for cosplay purposes but I am grateful for all the tips