Wow - good luck Tulip. I agree with everything Tess said. I found reading books and articles on the internet really helpful (and sometimes really scary!) - plus the forum members have been really supportive.
Here are the books I have read: Raw & Natural Nutrition for Dogs: The Definitive Guide to Homemade Meals
by Lew Olson Work Wonders: Feed Your Dog Raw Meaty Bones
by Tom Lonsdale
I have a friend who's a vet who is really encouraging and helpful and she suggested I never feed bones from an animal that my size of dog would be unlikely to kill. So, I'm not giving him beef bones for example - whereas a large breed may be OK with them. I'm sticking to chicken, duck, rabbit (if I can get some) and later some lamb - plus meat from a range of animals including beef. I've also been giving him mashed up vegetables (some cooked, some raw) though it seems the jury's out on whether they're needed or not plus I've given him raw egg and a small amount of cottage cheese.
At the moment I'm feeding him around 20% of his body weight in food per week but I'm going to increase that because he seems to need it. I'm still finding my way and the basic rule of thumb is - if he's getting a bit thin he needs more; if he's getting a bit tubby he needs less!! He probably needs more as he's a puppy too.
I've also found a great local source of organic meat which sells chicken and duck carcasses/necks etc for 70p/kg which I think is a good price. Make sure you're not buying condemned meat - else you may as well feed from a tin!
A local lady has some great information on her site (link below) on the pros and cons. Why a ‘Natural Diet’? The Lady Dog Whisperers' Blog
Sounds like you've made a good start. It still slightly scares me how much bone my little puppy can crunch his way through! He poos way less than other puppies his age and it is virtually odourless which is great.
You will find that you will come across people who are vehemently against what you're doing but as long as you've done your homework I'm sure you'll be fine.