Issues. Need advice

Im not too fat, I'd say average around my belly. But, I have VERY skinny arms and on my chest, you can feel my ribs as there is only a thin layer of skin. I feel kinda confused as to why im slightly fat around my belly but extremely skinny on my arms and chest. My friends have seen my chest and say its extremely weird. Idk what to do.

Btw, im only 14 so it isnt a major issue but i just wanna be normal ;(

Is very common and normal that there isn't a large amount of fat around your ribs so no worries . now lets move to the arms , seeing your profile identify you as a male i would just directly assume that you are just lacking muscle mass, as a 14 male your metabolism is running in extremely intensity , try doing some basic work out such a push up and plank daily , belly is where most fat are store so is the last part of your body to lose all the remaining fat.