I wish you luck and applaud you for realizing that you can't give her the life she needs and so deserves as a Dobie and reaching out for help instead of turning your back on her and giving up.
I know you love her and want to keep her, but as you said:

"I think maybe it might be the fact that I can't give her as much freedom or leeway as I gave my dogs growing up"

As for having a trainer or behaviorist observe you and Sheere, I think that should be one of the first things you need to do and not a last resort.
This way they can tell you what you need to do and how to help you both.