I already have some fat on my belly, but I can't seem to get much on my arms and legs?

I'd love to gain some weight to look cuter and I already have a good amount of it on my belly and butt, but my arms and legs never seem to get any bigger while my belly keeps increasing, I cant find much consistent info on how to fatten my whole body that isn't just "eat more" (im afraid that if I simply eat more of what I already do, which includes high carbs foods, all fat would end up disproportionately on my stomach and look ugly).
So does anyone have experience or can tell me how to gain fat on the rest of my body if I already have a fat belly? I prefer gaining fat rather than muscles, being muscular ain't my thing ¯\_(ツ)_/¯.