I'm not so sure about this..

How long is it ok to feed one RMB sourse?

It's different for many dogs... personally, I wouldn't feed one source for over a month, but it does depend on the meat type/quality, the dog, and the supplements being fed (if any). As much variety as possible is the best, as long as your dog is not getting sick from switching around.

How often can I switch to a diffrent RMB sourse? Everyday? Every other day?

That completely depends on Sammy. Generally, you should start with one meat source and stick to it for a couple of weeks, or until she has consistent, solid poops and she's doing well. Then, introduce another for the next week or two. It's advisable not to switch meat sources from day to day when you're just starting out, so that if a certain meat doesn't agree with her, you'll know which one it is.

After getting adjusted to the diet, you can switch RMB's as much as you want! I feed turkey for breakfast and pork for dinner, and beef muscle meat with chicken RMBs in one meal, and my dogs have no issues with that. Some might. It's just going to take a little while to get into the system of feeding raw, and eventually it will become second nature! ;3

I'm getting a lot of mixed signals about ground meat meals, what's up with them? Are they ok? are they necessary? Do I buy meat pre-ground or grind it myself(if possible)
(Though I don't really plan on using ground meat, I've always been curious)

I have heard that ground meat contains more bacteria. Again, it depends on your dog, and how she handles it.

Are you talking about ground meat (like ground beef, ground turkey, etc) or pre-made raw with the meat/bone/sometimes supplements or vegetables that you buy from feed store or pet stores? I like pre-made. I started on it, and I keep a few tubes on hand for quick meals, just in case. Some of the companies are better than others, and some are very over-priced, but most sell really high quality products. They certaintly aren't necessary, though.

How long should the RMB and organ meat be frozen before it's ok to feed Samm?

I freeze pork for 1-2 weeks, it's just a knee-jerk reaction, but probably not necessary in the US.
I don't freeze anything else for a set amount of time, though.

For some reason I don't feel like giving my dog nothing but a 1lb (the amount she should eat approx.) of chicken quarter or back or whatever and that be it for the day, is good for her. I mean, meat, bones, and a bit of organ meat is all she really needs? It seems too good to be true. I don't know..I think I'm just getting all nervous because I'm actually going to be switching her over to the diet I always wished I could put her on.

I feed Gonzo about 1 lb, and Fozzie a little bit less. Is Sammy a smaller GSD? Some dogs, depending on how active they are and how easy or hard it is to keep weight on them, need more or less than is recommended. Start with 1 lb and up her intake a little if she seems ribby, or decrease it if she seems a little over-padded. Sometimes, if I don't feel like cutting up a chicken and they get 2 lbs one day, they just get a light meal the next day. It doesn't have to PERFECT every day, just over time.

It's up to you whether to supplement or not. Plenty of people are happy without supplementing, but I choose to, because again, I am a huge worrywart to the max! I've also seen what I feel are improvements in my pups after experimenting for a while with different supps.

I mean, meat, bones, and a bit of organ meat is all she really needs?