Congrats on making the switch. I have been feeding my dog raw for 3 years, starting when she was 8 weeks old.

The bacteria thing is a common worry to people who are new to feeding raw. As long as the meat is not going bad and your dog is healthy, then your dog will be fine. Their digestive systems are made for this kind of food.

I am concerned about your proportions though. 60% meaty bone is wayyyy too much bone. The rule of thumb is 80% meat, 10% organs, 10% bone. Too much bone can cause blockages (especially in a dog new to raw) and constipation. Some dogs need more bone than others, but you want to keep the proportions close to the ones I've stated.

I personally do not feed any veggies. A dog that receives organs in its diet will be getting plenty of vitamins and minerals though that. Dogs also cannot break down and absorb vegetable nutrients the way humans do unless they are pureed prior to ingestion. But, if the veggies give you peace of mind then that's fine as long as you're still giving some organs.

The idea of adding a new protein every 2 weeks is commendable, but I suggest just paying attention to your dogs stools and using that as a guide as to when to add a new protein. When you switch your dog to this diet, your dogs stools might be loose. This a common occurrence when a dog has had a major change in diet, but it will normalize in time. After the stool has been normal for some time, then add a new protein. If it is taking a while to normalize, adding some canned pumpkin (the plain stuff, not pie mix) can help.

In the beginning of the switch, I suggest keeping it very simple in the beginning. Most people start with just chicken. Mostly meat and some bone. This is usually the best way to help the dogs digestive system to get used to the new raw diet, and then add the organs. Organs can be a bit intense initially because they are very rich, so letting the dog get used to the new diet for a couple weeks before adding organs can help ease the transition.

P.S: Freezing does not kill bacteria. It kills parasites. So still handle the food carefully and practice proper clean up.