Hi Deb and WELCOME

- so glad you found us! Congrats on your new rescue!
Rescue can indeed be tough, no doubt about this. Deep breaths

! Everything will be okay though...just takes love, compassion, understanding, and a willingness to stick with learning about this kiddo

. Lots of commitment - which it sounds like you have.
So first, I'm confused - exactly how long have you had her now? Less than 10 days...?
If so, I would not be changing diet at this time. In fact, given the level of her stress at this time (as well as yours, and your husbands) -- I really would *not* be changing to raw until things are more settled for the whole situation. And I'm a big proponent of raw - that's what I feed. But I just don't think that diet is what's really important right now.
I'd let her settle, learn about her, take her for walks...just let things be. If the resource guarding is way too much presently -- then take away all toys from her in "public spaces" -- and instead, allow her free access to "her things" when she is in "her space" if she has one (ie, like an Iris pen area or X-pen area or...?).
Once things feel more settled - then perhaps engage a trainer who is experienced with resource guarding (or, research it more yourself) and have them come to your house and help teach you what to do.
What do you mean she "growls at everyone" -- describe that more please...you mean when they approach her? Try to pick her up? Or? Does she growl at you? Are they invading her space?
Anyway, just take lots of breaths

and know it will be okay - there is really no telling *what* this poor little baby has been through - she could be extremely traumatized...and may take a lot of patience.
I'm also going to ask LadyJane to look at this thread as well.
Keep us posted - we're here for you!