I think if you are turning him over and holding him in that position, you are going to do more harm. Please enjoy your baby and take it slow - kindness first. Get yourself a great book on bring up puppies - because if you are getting mad by correcting a 8 week old, you will not enjoy the love of your pup. He is trying to figure out things also, remember he is only 8 weeks old
Gentle training, treats for good actions and NO - for bad and try to get him to do something good after the NO --- is said & if he does it, whether sit or come, give him a treat. Puppies need understanding & a good training class is a great idea. Find out about one close to where you live, find out about the age to start & have fun with your guy. Might ask a GS Rescue in your area if they know of any great training classed in your area. Good Luck.

Gentle training, treats for good actions and NO - for bad and try to get him to do something good after the NO --- is said & if he does it, whether sit or come, give him a treat. Puppies need understanding & a good training class is a great idea. Find out about one close to where you live, find out about the age to start & have fun with your guy. Might ask a GS Rescue in your area if they know of any great training classed in your area. Good Luck.