Vacuum Leak??

Hey, so I recently bought a K10 Micra with the 1.2 carbed engine. Lately I've been noticing a whistling sound everytime I lift off the throttle, which tends to disappear after about 30 minutes of driving. I'm guessing it's a vacuum leak, but I figured I'd ask here in case anybody else has had similar issues. If it is a vacuum leak, would replacing the vacuum hoses be a suitable solution, or would I have to do something else? Sorry if this is a stupid question, I'm very new to owning and working on cars 😅😅