Sorry I can't help with personal experience with a breach birth, but I think it is AWESOME that they are willing to let you try, and they will be there monitoring and making sure all is ok.
They prefer prems to be born Vaginally too, as it it really good for their lungs, as it is for FT bubs, but can have a bigger impact on prems, the 'roids will help a lot too!

I hope your little one stays warm and cosy for a while longer, everyday in the belly counts, I had a 33 weeker so if you have any prem questions feel free to ask or PM me PM me

Will cross fingers that she spins by herself.

Are you on strict bed rest?

If so it may make the Spinning Babies stuff quite tricky/risky. But your Dr's would be able to see if it is safe enough to try or it may be too risky to try now as it may bring on labour again. But if you can hold on a bit longer you may be able to try then, if not now.

Sending you lots of spinning and warm and cosy vibes for your little girl
xxoo