Lg volt freezing on home screen
Since you confirmed it's the launcher, this isn't too bad of a fix.

Open settings, go to apps, then swipe to all. Scroll until you find an app called Laucher. This is actually your home screen. 
WARNING! This will erase your home screen. Take screenshots if you want to put it back to the way it was!
Clear the cache and data of the app.
Restart your phone. If this fixes it, congrats! Otherwise, you can try downloading a new launcher from the Google Play Store or factory reset the device.