You need front derailer adjustment. It should have tension adjusters on the bottom frame tube. If that's not enough adjust the cable tension where it connects to the derailer. You basically play with tension until it's just right.. Go through all front and rear gears while your bike is upside down, and play with it. You'll see chain rubbing against the derailer, adjusting tension moves derailer left or right until there is no grind.

After, take a ride an go through gears. Adjust as needed.