If you’re skinny but have a belly, it is possible that you’re just bloated. You might just have a body type that stores fat around your mid section, then yes, CICO is the answer. Or you might be able to adjust your diet to reduce bloat, you can read up on elimination diets to test for sensitivity to common things like dairy, wheat, etc. If you drink alcohol you can try cutting that out for a month or so to see if that helps- there’s a reason it’s called a “beer belly.”